How to Select Mold Opening Prevention Plates — Length, Cut-Out, and Strap Options
Key Takeaway: Choose selectable-length plates for standard molds (fastest delivery), configurable-length plates for custom fit, configurable cut-out plates for non-standard mold profiles, and mold straps for quick daily handling. For shipping, use bolted plates. For workshop crane lifts, use straps.
Four Prevention Device Options
| Type | Customization | Security Level | Install Time | Best For |
|---|---|---|---|---|
| Selectable Length | Fixed lengths, pre-drilled holes | High (bolted) | 2-3 min | Standard molds, fleet-wide safety |
| Configurable Length | Custom cut to size | High (bolted) | 2-3 min | Custom molds, exact fit |
| Configurable Cut-Out | Custom profile cut-outs | High (bolted) | 2-3 min | Molds with protruding features |
| Mold Straps | None (universal clamp) | Medium (clamp grip) | 30 sec | Daily handling, crane lifts |
Sizing Prevention Plates
- Width: Plate must span the full parting line width. For selectable lengths, choose the nearest size that equals or exceeds mold width.
- Hole pitch: Bolt holes must align with tapped holes in both mold halves. Standard hole pitches match common mold frame dimensions.
- Thickness: Standard 8-12 mm steel. Sufficient for holding mold halves closed during transport vibration and forklift handling.
When to Use Straps vs Plates
- Plates for shipping: Bolted connection provides maximum security for long-distance transport. Vibration, shock, and handling forces during shipping require rigid bolt-on restraint.
- Straps for daily handling: Clamp-on straps install in 30 seconds without tools. Ideal for workshop crane lifts and short-distance moves where speed matters more than maximum security.
- Both for complete coverage: Many shops use straps for daily handling and add bolted plates before shipping. This provides the right balance of convenience and security at each stage.
Frequently Asked Questions
Are prevention plates required by regulations?+
Most workplace safety standards (OSHA General Duty Clause and international equivalents) require molds to be secured during lifting, transport, and storage. Prevention plates and straps are the standard compliance solution.
Can selectable-length plates fit multiple mold sizes?+
Yes, if hole spacing is compatible. Standard-pitch plates can fit multiple molds in a similar size range. Keep a set of common lengths for fleet-wide use.
How many prevention plates per mold?+
Minimum 2 plates per mold (one on each side of the parting line). For heavy molds (>500 kg), add 2 more plates for a total of 4 — one per mold side.