Note the core conclusion of the mill's choice of the screw.

First, the plastic plate number and filling ratio are identified, then the plastics specifications, product sizes and mass defects are checked, and the long-range ratio, compression ratio, mixing structures and screw material is finalized.

What factors should be taken into account in the selection of a screw by the plating plant?
1. Compatibility with raw materials
Different plastic materials (e.g. PP, PA, PVC, PC, ABS, TPU, etc.) have different compression requirements for screws, long-range ratio, screw depth, coding segment design, etc.
The selection of incompatible screws may result in:

• Melting and instability of plastics

• Color differential

• Demolition difficulty

• High product deficiency rate

✅2. Product type and accuracy requirements
For example, the production of optical parts, transparent parts, electronic thin shells, plastic toys, etc., have different requirements for the shearing, stability, gelatinity, etc. of screws.

Production capacity and speed
For large orders or automated production lines, plasticization is required to be efficient, rubber-stabilized, short-cycle, and higher requirements are placed on the materials and structures of the screws.

✅4.
High wear and tear materials such as GF (glass fibre), carbon fibres, flame retardation ABS, etc. will quickly wear and tear ordinary screws.
The use of nitrogen-coated alloy steel or double metal screws is directly related to the frequency of maintenance and the service life of the equipment.

5. Price-benefit balance of the screw
Not as expensive as possible, but as input output ratio:

• A high-performance screw can be used for an additional two years, reducing downtime due to the replacement of the screw.

• More stable adhesive performance, higher rates and time-saving manual adjustments.

Data to be recorded before implementation

• Material integrity number, filling ratio, flame-retarding system, refill ratio and dry condition.
• Note plastics brand, model, screw diameter, voltage, back pressure, turn speed and current screw structure.
• Indicators of product size, wall thickness, appearance or strength, and current adverse phenomena and frequency of occurrence.
• Continuous production cycle, refuelling frequency, machine clean-up method, wear and tear record and planned useful life.

How to validate the adjustment results

It is recommended that the current process baseline be established, followed by a single-variant test model. Each round records the measurement of time, melting temperature, product weight, formation cycle and bad rate, avoiding multiple parameters being changed at the same time to determine the cause. The parameters in the text are used to illustrate design thinking and should not replace material supplier data and on-site safety protocols.

What kind of support is a star-friend screw?

Starfleet Mechanical Equipment Co. Ltd. (Starfeng) can provide a reset of materials and work evaluation, screw structure, base and surface treatment options, non-spectrum customization, and trial modelling issues around a plume factory. The submission of information on raw materials, equipment and products could lead to more targeted programmes.

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