Blow moulding machinery: keep change parts with the right machine
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A blow moulding machine can appear complete while its change parts sit on several racks. Before offering it for sale, match the moulds and associated parts to the machine, confirm ownership and state which sets are included.
Begin with the process and model. Extrusion blow moulding and other blow moulding methods do not use identical tooling arrangements. The component examples below need checking against the machine's own documentation.
A mould is only one part of the change
For a documented extrusion blow moulding setup, the mould, blow pins and transfer equipment may have a defined relationship. Bekum's magnetic quick-change system is one manufacturer example: its description identifies mould and blow-pin changes and notes transfer tooling that remains with the moulds.
That example is useful for asking what belongs together. It does not mean an older Bekum machine, or another manufacturer's design, has the same system. Avoid copying a modern change-time claim into a used-machine listing.
Ask the production specialist which parts change for each recorded product and where they are now. Keep the names and reference numbers used in the documentation. A handwritten product name on a box may be a lead, but it is not a complete inventory.
Build the change-part register around a format
Give each documented format a reference, then identify its parts and evidence.
| Register field | What the seller should establish |
|---|---|
| Machine | Model, serial number and any relevant station identity |
| Format reference | Internal product or tooling reference approved for disclosure |
| Mould | Tool number, documented configuration and visible identity |
| Associated parts | Identified blow pins, transfer parts or other model-specific items |
| Storage | Rack, box or pallet number for parts not fitted |
| Compatibility evidence | Manufacturer information, tool drawing or documented machine use |
| Ownership | Written approval for each customer-specific item |
| Missing pieces | Specific gaps requiring identification or replacement assessment |
| Inclusion decision | Included with machine, separately offered, retained or unresolved |
A useful photograph set follows this register. Show the complete identified group, then the markings that link individual parts to it. Keep unresolved pieces outside a group described as complete.
The mould ownership and release guide covers approval in more detail. A mould owned by a customer may need returning even when the machine is sold. Record that exclusion before a buyer relies on it.
Keep a production claim separate from an inventory
A complete-looking format set does not establish the output a buyer will achieve. If historic production records are available and may be shared, identify the product, material, date and relevant configuration. Present them as records of that work.
Avoid promises based on nominal container volume alone. A buyer's proposed product can introduce different requirements, and the manufacturer or an appropriate process specialist should assess suitability. The seller can help by providing accurate identifiers and permitted documentation.
If modifications have changed the original arrangement, use the machine modification chronology. State which records describe the current equipment and which belong to the original build.
Follow the parts beyond the machine
A loader, dryer or other plastics auxiliary may support the machine without being part of a format kit. Keep its identity and sale allocation separate. This prevents a shared unit being counted in two offers.
Where product handling continues into packing equipment, the packaging change-part manifest can track the downstream format parts. Use matching references where appropriate, but do not combine ownership decisions or assume every downstream part belongs with the mould.
Before collection, reconcile the agreed package against its storage locations. A signed list of numbered containers is more useful than a note saying "all tooling in stores". Record any agreed change to the package and notify the sale organiser before handover.
For a manufacturing sale enquiry, send UK Auction Group the machine details, approved format register and photographs. That gives buyers a clear account of the equipment they can assess and the parts they will receive.
Continue through the manufacturing and process-equipment guide for related plastics machinery.
Sources
This guide gives general information. Equipment-specific, legal, tax and safety decisions may need a qualified adviser or competent specialist. The guides do not promise sale prices, fees or results.