When the size of the [situation definition] drift is checked to measure stability from the actual production scene of the plant, not only the diameter of the spiral or the price quoted. It is recommended that the frequency of defects, time periods and changes in process parameters be first collated, and that a set of reference data be kept before and after maintenance to determine wear and tear trends. 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. Plants should write quality standards in quantum sets, sample numbers, upper and lower limits and determination rules, and tie planned lifetimes to annual operating hours, feedstock types and maintenance frequency. 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 base, alloy layer and surface treatment should be selected on the basis of grinding, corrosive and thermal loads; and the drive-and-cracker, the rate of rotation and the screw cores should be checked to prevent the production from increasing at the expense of mechanical safety. 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. A planned refuelling test should be added to the test to examine residuals, black spots and cleaning material consumption, and to maintain sufficient time under normal ceiling loads to observe twists, temperatures and measure drift. 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, the inspection cycle should be developed in terms of both operating hours and tons of processed raw materials, and should be combined with cleaning, measurement, photographing and sampling in shut-down windows to reduce duplication. 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 [comprehensive cost] could not simply be a screw price, and the vendor ' s on-site support, spare parts delivery period and failure analysis response time should be quantified into TCO, and the cost of inventory, maintenance and rust resistance for the back-up wheel should be calculated and compared with the cost of emergency delivery. 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 single-testing models representing the production status, and that the maximum number of repairs be set for each drop and surface thickness recorded for the refurbishment. When there is a significant change in the feedstock formulation, retrospective ratio, product structure or target node, the applicable boundary of “how to check the measuring stability of the screw when size drifts” should be reassessed, rather than defaulting that the old conclusion is permanent.

Topic: Quality diagnosis and selection