[Scene definition] How to retain the screw selection experience when rerouting or replanting a product is based on the actual production scene of the plant and cannot be based solely on the diameter or price of the screw. It is recommended that baseline data, control tests, process capabilities and curricula vitae be first collated and then observed at single, hourly and three scales per 10,000 items. The aim of this step is to establish comparable old programme benchmarks so that subsequent screw changes can be supported by data.

The most easily overlooked of the topic is the coherence between short-term improvements and long-term stability. Plants should bind the planned lifetime to the hours of operation, the type of material and the frequency of maintenance, and place red lines of quality and equipment loads at the same time for key products. 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 determine whether or not to stereotype and reproduce using reversible data. In geometry and materials programmes, the reverse ring structure and back-flow gap should be assessed on the basis of material fluctuations and injection pressure; and the dead-angle, reverse-flow and screw-head residual areas should be checked for colour and refuelling. 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-valid] program proposes a minimum of 48 hours of continuous operation, with a 100-mode extraction for each stabilization phase, and records the screw-back load, back pressure stability and daily production. The test should be conducted in a grouping of models, stabilization and long-duration samples to facilitate comparison, with only one factor to be changed at each time and an empty run phase to restore the baseline conditions. 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.

When the [stabilized production] spiral is shaped, trend maps should be created for the plume diameter, the reverse ring gap and the inside of the cylinder, and spare parts should be discharged early when the wear and tear trend is close to the threshold and not be processed until the quality is out of control. 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 [comprehensive cost] cost table should not be a single spiral price, but should set three life-cycle scenarios that are optimistic, benchmark and conservative, so as to prevent a single hypothesis from magnifying the return on investment, and set a minimum production threshold for a dedicated screw, re-comparable when production is insufficient. 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 three consecutive shifts be followed to avoid the use of single-temporal models to represent the mass production status, and that a system of metallic alien separation and magnetic inhalation be put in place, as well as a post-normal examination of the prune damage. When there is a significant change in the feedstock formulation, retrospect ratio, product structure or target node, the applicable boundary of “how to retain the screw selection experience when the product is diverted or converted” should be reassessed, rather than defaulting on the old conclusion being permanently valid.

Title of article: A guide to the selection of a plastic factory at the end Data validation and continuous improvement