Injection moulding parts with SPG's Pre-Tension Tool
SPG Pre-Series Tooling & Prototyping has a several patented Pre-Tension Tools which are used to make low cost injection moulding of large products possible. In general these frames are used for bumpers, spoilers and instrument panels.

| Injection moulding parts with SPG's Pre-Tension Tool |
| How does it work? |
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The patented Pre-Tension frame holds a compact aluminium mould including all slides and inserts needed for producing products. Forces that occur during injection moulding, and that usually require a large tool, are compensated by the Pre-Tension frame. The compact aluminium mould can be easily switched for that of another product. Parts produced are close to production quality, including standard hidden parting lines for bumpers. |
| Applications |
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Aesthetic validation. Technical validation such as assembly and crash testing. Pre-production launching. |
| Lead time |
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Typical lead time is 8-12 weeks (depending on size and complexity). |
| Advantages |
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Low cost and short lead time (versus production mould). Use of original production materials. Injection moulding with (sequential) hot runners. High volume of parts possible. Tool modifications are possible. |