Medimals Mould Development Timeline 60 Day Tooling and 30 Day Prototype Plan
A mould development project succeeds or fails long before the first sample comes out of the press. For Medimals, the key timeline decision is clear: use the 60-day route for automatic multicavity tooling when T0 samples must be produced as per specifications, or use the 30-day rapid injection moulding route when the team needs functional prototypes faster.
Both paths have value. The 60-day plan supports production intent, repeatability, automation, and multiple cavities. The 30-day plan supports early validation, design learning, and faster stakeholder decisions. The right sequence often uses both: rapid prototypes to reduce uncertainty, followed by a controlled multicavity tool build for T0 sampling.
This post outlines the practical project timeline, the role of each phase, the risks to watch, and the working habits that help keep a mould programme on schedule.
The project timeline should match the decision being made
A clear Injection moulding timeline helps teams avoid one common mistake: using prototype samples to make production claims, or waiting for production tooling when the immediate need is design learning.
For Medimals, the two practical routes can be framed as follows.
Project path | Typical duration | Main output | Best use |
Rapid injection moulding prototypes | 30 days | Prototype parts from a rapid tool | Fit checks, handling trials, design review, early functional checks |
Automatic multicavity production tooling | 60 days | T0 samples as per specifications | Production validation, process trials, cavity balance checks, stakeholder approval |
The 30-day route does not replace full production tooling. It reduces risk before money and time are committed to a more complex tool. It can expose issues such as wall thickness variation, snap-fit stiffness, undercut concerns, assembly mismatch, and surface marks.
The 60-day route is for building automatic multicavity tooling, where the tool design must account for repeatable production. This route requires more control over gate location, cooling, ejection, steel selection, cavity layout, runner design, venting, tool movement, and part consistency across cavities.
In a well-managed project, the timeline does not run on hope. It runs on controlled inputs:
Approved 3D CAD files
Agreed 2D drawings with critical dimensions
Confirmed material grade
Surface finish requirements
Expected production quantity
Tolerance plan
Parting line and gate preferences
Sampling and inspection criteria
When these inputs arrive late or change often, the timeline moves. The mould maker may still work quickly, but design changes create rework in engineering, machining, polishing, fitting, and trials.
The 60-day automatic multicavity tooling plan
The 60-day tooling plan is suitable when Medimals needs T0 samples from an automatic multicavity mould built to production intent. T0 does not mean final approval. It means the first formal samples from the new tool, used to check whether the tool and part are moving in the right direction against the specification.
A typical 60-day plan can be divided into clear phases.
Phase | Typical timing | Main activity | Key outcome |
Project kick-off and data freeze | Days 1 to 3 | Confirm CAD, material, cavities, finish, and quality needs | Stable project brief |
DFM and tool concept | Days 4 to 8 | Review mouldability, parting line, gating, ejection, and risk points | Approved tool direction |
Detailed tool design | Days 9 to 15 | Complete mould layout, cooling, runner, inserts, slides, lifters, and automation needs | Tool design release |
Steel ordering and machining | Days 16 to 35 | Procure steel and machine core, cavity, plates, inserts, and moving parts | Major components ready |
EDM, grinding, and finishing | Days 30 to 45 | Complete fine features, shut-offs, texture preparation, and precision fits | Tool details completed |
Assembly and bench fitting | Days 42 to 52 | Assemble mould, check movement, polish, vent, and fit | Tool ready for trial |
T0 trial and sample inspection | Days 53 to 60 | Run first moulding trial and inspect samples | T0 report and correction list |
These windows can overlap. For example, some standard mould base work may start while electrode work is still in progress. Still, the sequence must remain controlled. Skipping DFM or rushing tool design usually shifts the delay to a later stage, where correction costs are higher.
Why the early design phase matters
The early phase decides much of the tool’s performance. A small decision on gate position can affect visible marks, weld lines, filling pressure, packing behaviour, and trimming needs. A weak decision on ejection can create scuffing, deformation, or part sticking.
For automatic multicavity tooling, the team also needs to think beyond one good part. The mould must fill each cavity consistently. Cooling must keep the cycle stable. Ejection must work at production speed. If the tool has slides or lifters, all moving elements must repeat reliably.
The phrase “as per specifications” needs to be clear before steel cutting begins. Specifications should include dimensions, tolerances, material, surface finish, colour, appearance limits, and any assembly needs.
What T0 samples should prove
T0 samples are not only parts. They are evidence.
They help answer questions such as:
Does the material fill the cavities fully?
Are all cavities producing comparable parts?
Are short shots, sink marks, flash, burn marks, or weld lines present?
Do critical dimensions match the drawing?
Does the part release cleanly from the mould?
Is the tool safe and practical to run automatically?
What corrections are needed before T1?
A disciplined T0 review leads to a clear correction plan. Some changes may be process-related, such as pressure, temperature, cooling time, or packing. Others may require steel correction, venting changes, polishing, shut-off adjustment, or gate modification.
The 30-day rapid injection moulding prototype plan
The 30-day rapid prototype route serves a different purpose. It gives Medimals a faster way to test the part before committing to the full 60-day automatic multicavity mould.
A rapid injection moulding prototype tool is usually simpler than a production tool. It may use fewer cavities, simpler steel or aluminium choices where suitable, manual inserts, simpler cooling, or a simplified tool construction. The goal is not long-term production. The goal is fast, useful learning.
A practical 30-day prototype plan may look like this.
Phase | Typical timing | Main activity | Key outcome |
Input review and prototype scope | Days 1 to 2 | Confirm prototype objective, material, and must-check features | Clear prototype target |
DFM review | Days 3 to 5 | Identify moulding risks and decide acceptable simplifications | Prototype tool plan |
Prototype tool design | Days 6 to 9 | Create tool layout, gating, inserts, and ejection plan | Design release |
Machining and fitting | Days 10 to 22 | Machine core, cavity, inserts, and mould base features | Tool ready for trial |
Trial and sample moulding | Days 23 to 27 | Mould prototype parts and tune process settings | Prototype sample set |
Review and design feedback | Days 28 to 30 | Inspect parts, test fit, record changes | Design update list |
The prototype route is especially useful when the part has uncertain features. Examples include thin walls, living hinges, small clips, snap fits, internal ribs, decorative surfaces, or tight assembly points.
It also helps when decision-makers need physical samples. CAD reviews and printed models help, but injection moulded prototypes show more realistic behaviour for resin flow, shrinkage, stiffness, and part feel.
What rapid prototypes can and cannot confirm
Rapid injection moulded parts often reveal more than 3D printed parts because they use the intended moulding process. They can support functional checks, assembly trials, early drop handling, visual review, and packaging fit.
Still, teams should not overread the results. A prototype tool may not match production cooling, cavity count, automation, or cycle time. The parts can guide decisions, but they do not fully prove production readiness.
This is where the wording matters. In project documents, separate prototype results from production expectations. A simple note can avoid confusion later: prototype samples were produced from a rapid tool and may not represent final multicavity production performance.
The broader plan should cover timeline, injection moulding, types of mould, and the approval gates that connect them.
Each phase protects time, cost, and quality
A mould project may look like a straight line, but each phase protects the next one. When a phase is skipped, the risk does not vanish. It appears later as rework, trial delays, tool corrections, or unclear approvals.
Project kick-off creates alignment
The kick-off should confirm the business and technical aim. For Medimals, that means deciding whether the immediate target is prototype learning or T0 production sampling.
A strong kick-off records:
Part revision level
Approved CAD and drawing source
Resin and colour requirement
Number of cavities
Expected sampling quantity
Appearance standard
Critical dimensions
Approval process
Required reports and inspection format
This record reduces debate when questions arise during tool design or sampling.
DFM prevents avoidable moulding issues
Design for manufacture, commonly called DFM, is one of the highest-value steps in the full process. It checks whether the part can be moulded reliably.
The DFM review should examine wall thickness, rib design, draft angle, undercuts, parting line, gate options, venting needs, expected shrinkage, and ejection surfaces. If the part needs slides or lifters, the review should also test whether the movement is practical and stable.
A good DFM report does not only list problems. It suggests workable fixes and explains trade-offs. For example, moving a gate may improve filling but place a mark on a visible surface. Increasing draft may improve release but affect assembly fit.
Tool design turns decisions into steel
Tool design is the bridge between product intent and manufacturable hardware. It defines how the mould opens, fills, cools, vents, ejects, and repeats.
For automatic multicavity tooling, the designer must also account for balancing. If one cavity fills faster than others, part weight and dimensions can vary. If cooling differs from cavity to cavity, shrinkage can shift. If ejection load differs, some parts may mark or stick.
The tool design stage should end with a formal review. After approval, changes should be controlled. Late changes can affect machining, EDM electrodes, steel parts, and assembly schedules.
Machining and fitting need inspection discipline
During machining, small deviations can become large problems at sampling. Core and cavity accuracy, shut-off quality, insert fit, slide movement, and vent depth all matter.
Bench fitting is equally important. A tool can look complete and still fail in trial if movement is tight, vents are missing, ejectors bind, or shut-offs are not seating well.
The best mould shops build inspection into the work rather than saving it for the end. This helps catch issues while they are still easy to correct.
Sampling turns assumptions into data
The first trial should be treated as a data event. The moulding team should record machine size, material batch, drying parameters, barrel temperature, mould temperature, injection speed, holding pressure, cooling time, cycle time, and sample condition.
That information helps separate tool issues from process issues. It also helps future trials start from a known baseline.
Best practices and challenges for the Medimals project
The best way to protect a 30-day or 60-day plan is to manage decisions early and document them clearly. Speed comes from clarity, not from skipping technical work.
Best practices that help the timeline hold
Use a revision-controlled drawing and CAD file. Every stakeholder should know which version is live.
Freeze critical decisions before tool design release. Material, gate preference, surface finish, cavities, and key tolerances should not remain open.
Review the DFM report with engineering and quality input. Product performance and moulding reality must meet in the same discussion.
Separate must-have requirements from preferences. This helps the team make quick decisions when trade-offs arise.
Use clear acceptance criteria for samples. Avoid vague feedback such as “looks good” or “needs improvement”. Link feedback to dimensions, visual standards, function, or assembly.
Plan for T0 corrections. T0 rarely means the tool is final. A correction loop after T0 should be expected and scheduled.
Common challenges to watch
Material behaviour can surprise the team. Shrinkage, warpage, flow marks, and sink depend on resin, part geometry, and process settings.
Thin walls can create filling issues. They may need gate changes, higher injection pressure, or design revision.
Undercuts can increase tool complexity. Slides, lifters, and inserts add time, cost, and maintenance needs.
Surface finish can affect release. A fine texture or polished surface may need more draft than expected.
Multicavity balance can take time to tune. Even a well-designed tool may need gate, vent, or process adjustment after T0.
Late design changes can break the schedule. A small part change may require new electrodes, insert rework, or cavity modification.
The most reliable mould timelines are built around fast decisions, stable data, and honest trial feedback.
A practical way to run the programme
For Medimals, the strongest plan is to treat the 30-day and 60-day routes as connected, not competing.
Use the 30-day rapid injection moulding prototype plan when the team still needs to confirm design details, assembly behaviour, handling, or early performance. Use the 60-day automatic multicavity tooling plan when the design is stable and the requirement is to produce T0 samples as per specifications.
A practical project sequence could look like this:
Complete rapid prototype samples in 30 days.
Review prototype fit, function, appearance, and moulding risks.
Freeze design changes based on the prototype findings.
Start 60-day automatic multicavity tooling with stable inputs.
Produce T0 samples and inspect them against the agreed specification.
Complete correction actions before further sampling and approval.
This approach protects both speed and quality. It gives stakeholders early parts to review, while still respecting the technical demands of production tooling.
The main takeaway is simple: the timeline is not only a schedule. It is a decision framework. When each phase has a clear purpose, Medimals can move from concept to prototype to T0 samples with fewer surprises, better sample quality, and a stronger path towards repeatable production.
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