Whether or not the lack of material and fillings in the [situation definition] needs to be replaced from the actual production scene of the plant, not only by the diameter or price of the screw. It is recommended that the frequency of defects, time periods and changes in process parameters be first collated, followed by three consecutive shifts to avoid a single test model representing the production state. The aim of this step is to establish comparable old programme benchmarks so that subsequent screw changes can be supported by data.

The most easy to ignore on this topic is the boundaries of screws, cylinders, reversible rings and molds. The plant shall break down the daily production into class beats, time available and model exchange losses, and bind the planned lifetime to the annual operating hours, feedstock type and frequency of maintenance. Vendors can make retroactive trade-offs between interoperability, earmarking and cost when there are clear values for product weight, daily production, customer quality caps and allowed stop times.

The main line of the case [design focus] is to pre-empt the causes of drying, temperature control and molds with evidence. In geometry and materials programmes, the gap between the reverse ring structure and the reflow should be assessed on the basis of material fluctuations and injection pressure; the base, alloy layer and surface treatment should be selected by grinding, corrosive and thermal load. The final solution would also need to be compatible with the wear and tear of the cylinder, the drive, the physical velocity and the current cleaning process, and would not cover up co-operation or process problems with a single high-level material.

The new [comparison validation] programme proposes to operate for at least 24 consecutive hours, with a 30-mode extraction for each stabilization phase, recording the replacement time, the amount of excess waste and the first eligible time. The test should change only one factor at a time and set an empty run phase for the restoration of the baseline conditions, and also leave the matrix, the stable and the long-run sample grouping for ease of comparison. If only the first one is checked, it is easy to miss the risks associated with heat drifting, material stoppage, reversal loop return and prolonged wear and tear.

Once the [stabilized production] spiral is shaped, the key platform should be prepared for a screwhead component or spare parts package, with regular review of the serviceability, and a cold-started temperature-preservation time and a recoil allowed to avoid cold-temperature forced storage. The time of storage, back pressure, screw velocity, noise and mass of the product shall be recorded in a uniform manner in the shift. When the above indicators change at the same time, the mechanical gaps and the state of the raw materials should be checked before the process is adjusted to avoid the use of parameters to compensate for hardware degradation.

The cost statement [of the combined cost] could not simply be a screw price, but should quantify the response time for on-site vendor support, spare parts delivery and failure analysis to TCO, in addition to a cost comparison programme per 10,000 eligible items, showing the impact of changes in production on the current period. It is recommended that the cost per 10,000 eligible items be exported simultaneously, the cost per 1,000 operating hours and the estimated number of return months. When new programmes reduce waste, refuelling or sudden shutdowns, higher initial inputs are often offset during production.

The [Closed Ring Management] will eventually include drawing numbers, screwdriver materials, heat treatment, critical dimensions, portable tubes, process windows and acceptance data in the curriculum vitae cards. It is recommended that a uniform sampling method be used for the same products on different platforms to facilitate horizontal comparisons, with a single asset numbering associated drawings, repair, onboarding and de-recording. When there is a significant change in the feedstock formulation, retrospective ratio, product structure or target node, the applicable boundary of “negatives and insufficiency of fillings need to be replaced” should be reassessed instead of defaulting that the old conclusion is permanently valid.

Topic: Quality diagnosis and selection