The problem with many of the temperature control system inspection projects is not the lack of equipment capacity, but the omission of heating ring power, thermoelectric location, temperature differential and control response during the selection phase. If the maintenance provider completes the technical confirmation before the offer is made, it will significantly reduce the risk of re-engineering and complaints.

Old machine upgrades are the easiest to ignore system matching. New screws must be compatible with the needs of old drums, drives, brakes, heating, nozzles, control of travel and molds. Any build-up, speed-up or material upgrade should first measure the status quo, then determine whether the single replacement, plasticization component upgrade or the full retrojection of the unit. 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.

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. The focus of discussion in this paper is the heating ring power, thermal voltage position, temperature variability and control response, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

The configuration proposal should be based on the establishment of a baseline for air-borne warming and temperature differentials with each region, rather than using vague descriptions such as “enhanced” or “high performance”. The spiral drawings need to reflect the effective length, three-part scale, depth, compression ratio, tail connection and anti-reverse components; the material programme needs to distinguish the base, surface hardening, alloy layer or coating, and to indicate the pattern of failure for which they are intended.

The main risk of the scene was that the temperature failure would mask the screw effect. The issue of whether or not to be derived from a screw should first be excluded from drying, heating ring, thermal voltage, nozzles, reversible rings, wear and tearing of the material drums and changes in process parameters. The use of exclusions is more reliable than the direct replacement of components and also protects the time and cost of both the seller and the client.

At the time of acceptance, it is recommended that the temperature deviation and heat response be the main indicators, and that the temperature, screw velocity, back pressure, measurement position, buffer position, injection peak pressure and continuous sample weight be simultaneously recorded in the drums. At least three reasonable process points, low, medium and high, are covered to confirm that the programme is not effective under a single parameter. 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 the configuration after the customer has completed the heating ring power, thermal voltage position, temperature differential and control response can reduce erroneous orders and facilitate the production, testing, installation and sale of the same version of data.