[Scene definition] The screw selection and cleaning elements of PMMA high-light products are based on the actual production scene of the plant and cannot be viewed only in the diameter or price of the screw. It is recommended that the resin viscosity, thermal sensitivity, additives and retrospects be first collated and then that benchmarks be established for each of the three phases of start-up, stable production and refuelling. 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 is the risk of degradation of plastic windows and materials. Plants should set red lines of quality and equipment loads at the same time as key products, and should first identify acceptable ceilings for quality defects before discussing speed and energy consumption targets. 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 in this case is the geometry of the screws with real cards and formulas. In geometry and materials programmes, priority should be defined between interoperability and specializedness to prevent over-earmarked conversion difficulties; and end-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] programme proposes to operate for at least 72 consecutive hours, extracting 50 sims per stabilization phase and recording the number of downtimes, maintenance hours and the combined cost per 10,000 items. The tests should be carried out in groups of samples, which should be easy to compare, after they have been stabilized and operated over a long period of time, and should be co-signed by production, quality and equipment, so as not to allow a single department to be independently shaped. 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 cost statement [comprehensive cost] could not simply be a screw price, but should include a quantification of on-site vendor support, spare parts delivery and failure analysis response times in TCO, as well as separate prices for planned and unplanned shutdowns, which would also include delayed delivery losses. 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 reference set of data be maintained before and after maintenance to determine wear and tear trends, together with a system of metal heterogeneity separation and magnetic insulation, and to check for prune damage after anomalies. When there is a significant change in the feedstock formulation, retrospective ratio, product structure or target node, the applicable boundary of “pMMA high-light product screw selection and cleaning point” should be reassessed, rather than defaulting that the old conclusion is permanent.

Title of article: Guidelines for the selection of a plastic factory for end-of-service reference