Correct installation and simple maintenance can double the service life of custom injection moulded parts. This practical guide covers handling, fixing, cleaning and inspection intervals.
Use it as a working checklist when you write your next enquiry.
This category covers a family of products rather than a single item. In practice a buyer defines custom injection moulded parts by three things: the base resin, the format or dimension, and the performance or certification level it has to meet. Typical options in this category include tolerance class DIN 16901; shot weight 1 g to 3 kg; assembly and ultrasonic welding. Materials most often specified are Polypropylene, Polyoxymethylene, PC/ABS Alloy, Glass Filled Nylon, and the choice between them changes stiffness, temperature resistance, chemical behaviour and price.
In the industrial packaging sector the decision is usually driven by drop protection and cost per pack, with recyclability as a secondary requirement. Typical end uses include bulk containers, protective foam, stretch film.
The table below summarises the values that usually decide the material choice.
| Material | Density | Tensile strength | Service temperature |
|---|---|---|---|
| Polyoxymethylene | 1.41 g/cm³ | 60-70 MPa | -40°C to 100°C |
| PC/ABS Alloy | 1.13-1.15 g/cm³ | 45-60 MPa | -30°C to 110°C |
| Polyamide | 1.13-1.15 g/cm³ | 60-85 MPa | -40°C to 120°C |
Polypropylene is frequently the default selection here: PP is the lightest mainstream packaging resin and keeps its shape under repeated flexing.
A few simple habits extend service life significantly.
Outdoor service life depends mainly on the UV stabiliser package and the colour.
Beyond the base resin, most suppliers offer UV stabilised, food contact, flame retardant, anti-static and recycled content versions of the same product. Ask which additive package is included, because it is often the difference between a part that lasts three years and one that lasts ten.
Each step below has its own control points, and skipping one of them is where most defects start.
Secondary operations such as printing, welding, machining and assembly are often cheaper to do in the same factory, and they reduce the risk of mismatch between components.
Use this checklist when comparing two or three supplier quotations.
Send this list to your supplier with the drawing and you will receive comparable quotations from every factory you contact.
A new tool typically takes 25 to 45 days depending on cavity count and complexity, followed by T1 samples within one week. Existing tools can usually start production within 10 to 15 days of order confirmation.
Standard packing is export cartons on fumigation-free pallets, with custom labelling, barcode and retail packing available. We also handle consolidated containers and door to door delivery.
Colour is controlled with a masterbatch reference approved by the customer, and every production lot is checked against the approved sample under standard lighting before shipment.
We can provide ISO 9001 quality system documentation, material certificates, RoHS and REACH statements, and where applicable food contact, flame retardancy or drinking water approvals. Tell us your target market and we will match the document set.
For standard sizes and colours the minimum is usually one pallet or one production run; for custom tooling the economic minimum depends on the tooling cost amortised over the expected volume. Send us your annual volume and we will calculate the break even point.
If you are planning a new industrial packaging project, send us your drawing, annual volume and target properties, and we will come back with a material proposal, a tooling plan and a budget quotation.
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