When the project involves the design of a feeder segment, the screwdriver programme must start from the customer ' s real production mission. Prop suppliers need to organize particle sizes, stack density, friction and cooling of the pyrotechnic vents into a set of verifiable, calculable and retroactive input conditions.

Each size of the screw structure serves solid transport, melting, refining, measuring and injection sealing. The diameter, long-range ratio, three-part ratio, depth, compression ratio and front-end components need to be considered as a system; local parameters appear to be stronger and do not represent the raw materials and cycles of the package that are more suitable for customers. Technical communication distinguishes between three types of objectives that must be met, desired improvement and acceptable. It is necessary to meet the hard boundary of the item for the determination of equipment and screws, and it is hoped that the improvement item will be used for the comparison of standards and specialized programmes, while the acceptable item will help to control costs and deadlines. This would avoid stacking all requirements on a screw and would make it easier for clients to understand the real value of each configuration.

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. The focus of the discussion here is the cooling of particles, pile density, frictions and pyrotechnics, 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 depth, screw and surface state of the matching slot should form a standard process that can be repeated. 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 the above-mentioned steps are ignored, the most common consequence is a steady delivery of bridges, slippage and measurement of time fluctuations. The problems are often manifested in the trial phase of measuring time instability, insufficient stress residuals, buffer drift, unmelted, black spots, colour differentials or increased wear and tear. Continued increase in temperature, back pressure and turn speed at this time may temporarily improve the appearance, but may increase the shearing heat, material degradation and equipment load.

At the time of acceptance, it is recommended that the main indicator be feed stability and measurement time, and that the temperature, screw velocity, back pressure, measurement position, buffer position, injection peak pressure and continuous sample weight be simultaneously recorded in the drum areas. At least three reasonable process points, low, medium and high, are covered to confirm that the programme is not effective under a single parameter. Therefore, a simple logic of “symmetrically-sized screw” should not be applied to the design of the feed segments. 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.