02/Toolroom
Injection Mould Manufacturing
Prototype and series injection moulds built in our own toolroom, trialled on our own moulding machines and maintained for as long as they run.
Overview
A mould manufacturing company that also runs the moulds
The quality, cycle time and life of a moulded part are decided largely by the tool.
We build prototype and series injection moulds combining our in-house toolroom operations (DFM review, 3D CAD/CAM mould design, VMC machining, precision grinding, lathe, die spotting and tool assembly) with approved specialist partners for wire EDM, deep-hole gun drilling, and vacuum heat treatment. Every tool is trialled and qualified on our own 80T–450T production machines before parts are approved.
Because we mould production components from these tools, we design them to be run, maintained and serviced efficiently — eliminating finger-pointing between separate tooling vendors and moulding suppliers.
| Parameter | Capability & Execution |
|---|---|
| Tool types | Prototype moulds, single-cavity bridge tooling, and hardened multi-cavity series production moulds |
| In-house operations | Mould design & DFM, VMC cavity/core machining, turret milling, surface grinding, lathe turning, die spotting, bench fitting & polishing |
| Specialist partner processes | CNC wire-cut EDM, CNC spark EDM, horizontal/vertical deep gun drilling, vacuum heat treatment & certified hardening |
| Fitting & assembly | Die spotting, blue-matching parting lines, slider fitting, cooling circuit pressure testing (In-House) |
| Tool steels | H13, P20, 1.2344, 1.2738 with certified vacuum heat treatment (48–52 HRC) |
| Mould trials & validation | Sample moulding and validation on our own 80T–450T machines before production release |
Tool types
Moulds for each stage of a product
Prototype tools
Simpler tools that produce real moulded parts early, so design and material can be proven before series tooling.
Series production tools
Hardened tools with cooling and ejection laid out for repeatable cycles over long production runs.
Multi-cavity tools
Two or more cavities per shot where annual volume justifies the higher tooling cost.
Insert moulding tools
Tools that locate metal inserts securely, run on vertical machines with a rotary table.
Process
From approved design to approved samples
Design hand-over
The approved mould design is converted into machining data for plates, cavity and core inserts, sliders and lifters.
Machining
CNC and VMC machining of plates and inserts; gun drilling of cooling channels.
EDM & finishing
EDM and wire EDM for fine features, sharp corners and ribs, followed by polishing to the specified finish.
Die spotting & assembly
Parting surfaces spotted for even closure; guide pillars, ejection and cooling assembled and checked.
Trial & approval
Trial on a production machine; samples measured against the drawing and the tool corrected where needed.
Mould construction
What goes into a production mould
Cavity, core & guides
Cavity and core inserts form the part; guide pillars and bushes keep the halves aligned every cycle.
Cooling circuits
Drilled cooling channels control cycle time and warpage; cooling is often the longest part of the moulding cycle.
Gating & ejection
Gate position controls filling and weld lines; ejector layout releases the part without distortion.
Quality considerations
How we check a mould before it goes into production
- Closure and fit checked at die spotting and assembly
- Cooling circuits and ejection checked before trial
- Trial on the machine the tool will run on
- First samples measured against the part drawing
- Corrections made in-house and re-sampled until approved
In the toolroom
Building and finishing the mould
Cavities and cores are machined, spark-eroded, ground and hand-finished in our toolroom, then proven with a tool trial before production.
Machining
Cavities, cores and plates are milled on our CNC machining centres to the modelled geometry.
Spark erosion (EDM)
Wire and spark erosion form sharp corners, ribs and fine detail that milling cutters cannot reach.
Grinding & finishing
Faces are ground flat and parallel, then hand-finished and polished before the tool is proven on the machine.
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FAQ
Mould manufacturing: common questions
What information is required to manufacture a mould?
A 3D model of the part (STEP or IGES) and a 2D drawing with critical dimensions and tolerances, the material grade, annual volume, surface finish or texture, and the machine the tool must run on if it is not ours.
How is mould quality checked?
Fit and closure are checked during die spotting and assembly, then the mould is trialled on a production machine. First samples are measured against the part drawing and the tool is corrected if needed before approval.
What factors affect mould life?
Tool steel and hardness, the abrasiveness of the material (glass-filled grades wear tools faster), part geometry, cooling, operating conditions and how regularly the mould is cleaned and maintained.
Can existing moulds be modified?
Share details of the mould and the change you need. We will inspect it and confirm whether the modification is practical before quoting.
Should I choose a single-cavity or multi-cavity mould?
It depends on annual volume, part size and machine. A single-cavity tool costs less and is easier to correct; a multi-cavity tool costs more but lowers the price per part at higher volumes.
Tooling enquiry
Need a prototype or series mould?
Share your part model and volumes for a tooling feasibility review and quotation.