For the anti-reverse component selection, customers often ask first for price or term, but after sale by a pyrotechnic manufacturer, the speed of the seal, area of circulation, wear and tear and material filling should be checked. Only by quantifying these conditions can the standard screws have an interpretable boundary with the choice of a dedicated screw.

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. 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.

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 discussion in this paper is on seal speed, circulation area, wear and tear, and material filling, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

The configuration proposal should be reduced to the selection of reversible structures and gaps by material and speed, rather than using vague descriptions such as “enhanced” or “high performance”. The spiral drawings need to reflect the effective length, three-part scale, depth, compression ratio, tail connection and anti-reverse components; the material programme needs to distinguish the base, surface hardening, alloy layer or coating, and to indicate the pattern of failure for which they are intended.

The return flow is likely to result in inadequate pressure and miscalculation as a process problem, if it is done quickly on an empirical basis alone. 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.

Upon completion of the project, the delivery conclusion is based on reverse response, buffer and product weight, Cpk, and the size test, material or thermal treatment certificate, trial modelling record and maintenance proposal are archived. Sales teams can return after three months or a ton agreement to compare plasticization time, energy consumption, product fluctuations and wear and tear trends. Therefore, the simple logic of “symmetrically-sized screw” should not be applied to the reversible selection of components. 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.