Which energy-isolation records should be agreed before accepting a new injection molding machine or automated cell?
Request a machine-specific energy-source register, labeled isolation-point drawings, a documented method for controlling stored energy, verification responsibilities and a complete cell boundary. Have qualified personnel reconcile these records with the installed equipment and the site's approved procedures before maintenance access is authorized. A stopped HMI or emergency stop is not proof of energy isolation.
Decision checklist
- Name the equipment and maintenance activities covered by the handover, including peripheral equipment.
- Match each energy source to an identified isolation point and manufacturer documentation.
- Assign responsibility for site procedures, training, verification and unresolved actions.
- Separate shipment readiness from authorization to operate or maintain the installed cell.
Why this belongs in the purchase scope
A factory acceptance test can show that a machine completes its agreed production sequence. It does not, by itself, show that the receiving maintenance team can safely service the entire installation. A new press may arrive with good machine documentation while the robot, hot-runner controller, dryer or conveyor has a separate supply and a separate manual. The buyer's task is to make those boundaries visible before handover becomes a collection of unrelated files.
This guide is a procurement and documentation checklist, not instructions for performing lockout, releasing pressure or entering a machine. Only trained, authorized personnel should develop and carry out the equipment-specific procedure. Do not open cabinets, defeat interlocks or attempt a test based on a marketing article. Applicable local requirements and the manufacturer's instructions govern the actual work.
OSHA's hazardous-energy overview describes the risk of unexpected startup and stored-energy release during servicing. NIOSH's resource guide puts written procedures, training, periodic review and equipment selection into one program. Neither reference certifies a GEERPOWER installation; they explain why the document package needs more than an operating manual.
Define the cell boundary before listing documents
Start the RFQ review with a marked layout showing the press, mold utilities, robot, end-of-arm tooling, conveyors and auxiliaries included in the project. Ask which items share controls and which retain independent electrical, air, vacuum or thermal services. Equipment that exchanges a start signal with the press does not necessarily share its isolation arrangement.
List the activities the customer expects to perform: mold change, cleaning, nozzle maintenance, robot-tool service and fault recovery may involve different access and energy boundaries. The resulting document should identify which procedure applies to each activity, not invent one universal switch-off sequence. Include equipment supplied by the buyer as well as items in the machine supplier's quotation.
An emergency stop, a safety-door interlock and an energy-isolating device have different functions. Do not accept them as interchangeable descriptions in the handover file.
Use a handover evidence matrix
The following matrix is a request template. It names the evidence to obtain, rather than prescribing the isolation method for an unknown machine. Record the document revision, responsible person and acceptance status against each applicable row.
| Scope | Record to request | Question to close |
|---|---|---|
| Electrical supplies | Supply diagram, disconnect identifiers and equipment labels | Are separate controllers and auxiliary supplies included? |
| Hydraulic circuits | Circuit drawings and manufacturer stored-pressure instructions | Are accumulators or trapped-pressure locations identified? |
| Air and vacuum | Utility diagram and tooling documentation | Can loss of pressure or vacuum cause a load to move or fall? |
| Heat | Barrel, nozzle, hot-runner and temperature-unit documentation | What residual-heat restrictions apply to the planned work? |
| Mechanical and gravity hazards | Manufacturer restraint and maintenance-access requirements | Which moving or supported parts need an equipment-specific review? |
| Integrated equipment | Cell layout and responsibility matrix | Who reconciles the press, robot and third-party manuals? |
| People and procedures | Approved site procedure and training records | Who is authorized to verify the safe condition and release the work? |
Separate FAT evidence from installed-site acceptance
At the supplier's factory, agree which equipment is present, which documents are available and which checks can be witnessed within the approved FAT plan. If the customer's dryer or robot is absent, state that limitation explicitly. A successful demonstration of the supplied press should not be described as validation of a cell that has not yet been assembled.
At the receiving site, the responsible team should reconcile the actual utilities, final layout, installed peripherals and local procedures. Use a handover register to record what changed between FAT and site acceptance testing (SAT). Keep shipment approval, production acceptance and maintenance authorization as separate decisions with named owners; one signature should not silently stand in for all three.
| Stage | Supplier or integrator contribution | Buyer or site contribution |
|---|---|---|
| RFQ | Define supplied equipment and documentation | Describe activities, utilities and site review requirements |
| Before FAT | Provide configuration-specific drawings and open-item list | Agree witnesses, review scope and acceptance responsibilities |
| Before shipment | Identify supplied records and unresolved site-dependent items | Decide whether shipment conditions are satisfied |
| Installation and handover | Support clarification within the agreed scope | Approve site procedures, training and access authorization |
A practical example: adding a robot and vacuum gripper
Consider a planning example in which a buyer orders a press and later adds a robot with vacuum gripping. This is not a GEERPOWER customer case. The initial handover file describes only the press. The expanded cell now needs a review of the robot supply, tooling energy, supported loads and the relationship between machine and robot access.
The useful purchasing question is not simply whether a robot interface exists. It is who will update the cell boundary and reconcile the equipment-specific procedures before service access. Put that task in the scope and assign an owner. If it remains unassigned, the project has a documentation gap even if every individual item runs during a demonstration.
Close exceptions without turning them into promises
Use an action register with four fields: the unresolved issue, evidence needed, responsible party and the milestone it blocks. For example, an absent auxiliary drawing and an unreadable equipment label are different problems and may require different owners. Avoid vague entries such as 'safety to be confirmed' that cannot be signed off objectively.
Do not assume that a general certificate, a training attendance sheet or a photograph proves the adequacy of the complete installation. Ask what each record actually covers. Where an unresolved safety issue affects the planned work, the responsible qualified team must decide the restriction and corrective action; commercial pressure is not an acceptance method.
For a project review, prepare the proposed equipment list, destination country, layout, planned maintenance activities and the contact responsible for site safety. GEERPOWER can use that brief to clarify the requested supply and documentation scope. Final methods, validation responsibilities, price and delivery must be agreed for the specific project.
Common buyer questions
Is this a lockout/tagout operating procedure?
No. It is a buyer-side documentation checklist. Trained, authorized personnel must use the approved machine-specific procedure, manufacturer instructions and applicable site requirements.
Does pressing emergency stop isolate all energy?
Do not assume so. Stopping a process is not proof that electrical supplies, pressure, heat or gravity hazards are controlled. The approved procedure must identify the actual isolation and verification requirements.
Should a hydraulic and an all-electric press use the same checklist?
The document categories can be similar, but the energy register must match the actual configuration. An all-electric press can still have heaters, pneumatic tooling, a robot and other hazardous energy sources.
Who approves the final site procedure?
Assign this to the responsible qualified parties at the receiving site under applicable requirements. A supplier's manual supports that work but should not be treated as automatic approval of the full installation.
Can records be reviewed before shipment?
Yes. Review available machine and cell documents early, and identify what depends on final installation. Keep site-dependent checks open until the responsible team verifies them.
What should I send with an RFQ?
Send the equipment and peripheral list, destination, layout, expected maintenance tasks and your documentation requirements. Include any buyer-supplied equipment that interacts with the cell.
Sources and references used for this guide
This guide supports early project planning. Final machine selection and commercial configuration must be confirmed from the actual part, mold, material, factory utilities and production target.
