For cross-brand replacements, customers often ask first for price or term, but the distributor of the parts should first check the connection key, tail, screw, length and push structure. Only by quantifying these conditions can the standard screws have an interpretable boundary with the choice of a dedicated screw.

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.

Calculates the nominal value to be converted to the actual condition. The machine often uses PS as a reference for the gel weight, which should be revised by density when using other raw materials; the weight of the product should be added to the main course, traffic separation and a reasonable buffer. The larger the diameter of the screw, the greater the theoretical capacity, but the pressure of injections per unit area under the same hydraulic pressure or servo system will decline and the resolution of the measurement of the small amount of the aerosol may also be variable. The focus of discussion in this paper is on the connection to the flower key, the tail, the thread, the length and the nozzle structure, which must correspond to the customer ' s current mass production conditions and not be limited to the maximum values in the machine sample.

The building of brand-type archives based on drawings and physical mapping could be used as the main line for the advancement of the project, with 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.

If the above steps are ignored, the most common consequence is that the same tonnage or diameter does not represent a mechanical interface. The problems are often manifested in the trial phase of measuring time instability, insufficient stress residuals, buffer drift, unmelted, black spots, colour differentials or increased wear and tear. Continued increase in temperature, back pressure and turn speed at this time may temporarily improve the appearance, but may increase the shearing heat, material degradation and equipment load.

The acceptance is recommended as a primary indicator of the assembly match rate and the time of the stop, and the temperature of the drums, the screw speed, the back pressure, the measurement position, the buffer position, the injection peak pressure and the continuous sample weight are synchronized. At least three reasonable process points, low, medium and high, are covered to confirm that the programme is not effective under a single parameter. The sales proposal should answer three questions at the same time: why this selection was made, which conditions had changed and which were re-selected, and how the customer validated the results. Clearing these three issues would allow the replacement of cross-brand components to move from a trade in spare parts to a traceability technology project.