In screw-routing accounting, the manufacturer of retrofitting machines does not first have to address the choice of an off-the-shelf model, but rather to confirm the diameter, the maximum itinerary, the reverse front end space and the buffer amount. This step determines whether the subsequent spiral diameter, structure and material grade are well founded.

The platform parameters are understood separately. Locked-molecular tonnage addresses the pressure of the mould, and the reductive units address the problems of molten volume, pressure, velocity and plasticity, which cannot be replaced by one number. The salesman shall be based on the machine sign, the injection unit specification form and the actual course of the controller, and shall fix the nominal gel mass with the material density. 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.

Site information should preferably include both photographs, short videos and data sheets. Photos are used to identify machine interfaces, screw tails and front-end components, video can be observed to measure, buffer and abnormal sound, and data tables are used to calculate the rate of application, the need for plasticization per hour and the length of stay. If only partial information can be obtained, a list should be provided for confirmation, rather than a tentative condition being a definitive conclusion. The focus of this paper is on diameter, maximum routing, reverse front end space and buffers, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

The project may be advanced by calculating the effective volume as the main line, less buffer and process safety, and by arranging an evaluation of sales, design, process and customer participation. The evaluation focused on the completeness of the input data, whether the assumptions were confirmed by the client, whether the mechanical interfaces were matched, how standards and specialized programmes were selected, and who provided the acceptance data.

The theoretical cylindrical volume alone is likely to overestimate the effective geling capacity after the birth. 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.

Ultimately, the programme should be judged by the actual measurement of location and the maximum level of stabilization. If the result fails to meet the standard, each adjustment and result shall be recorded in five directions, by raw material, equipment, molds, process and screw, so as to avoid the loss of causal judgement by modifying multiple parameters at the same time. Where the information is temporarily incomplete, the pre-selection scope and the list to be confirmed may be provided, but it should not be considered a final commitment. The freeze of configurations after the customer completes the diameter, maximum itinerary, reverse front-end space and buffers can reduce erroneous orders and facilitate the production, testing, installation and sale of the same version of data.