PET preform mold project review
Define the mold before you compare the quote.
A PET preform mold is the injection tooling used to produce preforms for water, beverage, edible-oil, cosmetic and jar bottles. Use this core PET preform mould page to connect the preform drawing, weight and neck finish with cavity range, hot runner, cooling and injection-machine fit. The result is one bottle preform mold specification for technical review, trial acceptance and quotation comparison.
Common cavity review
24 to 96 cavities
Product definition
Application, neck, resin, weight
Quotation basis
Drawing, neck, weight, machine
Technical scope
Hot runner, cooling, trial, spares
Project definition
These five inputs create a useful starting point for the quotation. Send the information already available, and we will organize the remaining technical items into the project review.
Water, beverage, edible oil, cosmetic, daily chemical, large-container and wide-mouth projects place different demands on preform weight, neck geometry, appearance and production volume. The application gives context to every later decision.
Weight affects the total shot requirement, cooling load and realistic cavity range. Use the approved drawing or a confirmed sample value rather than estimating weight from bottle capacity alone.
The neck finish is matched to the closure and downstream line. Provide the controlled standard, drawing or cap sample when available so the complete 28 mm or other neck interface is defined.
Cavity count sets the output and investment direction. State the target preforms per hour, operating plan and preferred cavity count so neighboring options can be compared on one production basis.
The machine model and specification determine whether the proposed mold can fit, inject, cool, control and open correctly. A machine name alone is useful, but the technical sheet is better.
Start without a complete specification
Quotation scope
Two quotations can carry the same cavity number and still describe different equipment. The comparison should identify the cold side, hot side, control, service parts, trial obligation and documentation instead of hiding them behind one total price.
| Scope | What the proposal defines | Buyer check |
|---|---|---|
| Mold and cavity components | Core, cavity insert, neck ring, lock ring, wear components, mold plates, guiding and alignment items. | Record material, replaceability, quantity, interchangeability expectations and the drawings supplied after order. |
| Hot half and runner system | Manifold, nozzles, heaters, thermocouples, valve-gate actuation, insulation and connection arrangement. | Record the system make or specification, number of control zones, included spares and maintenance access. |
| Cooling and utilities | Cooling circuits, water connections, pneumatic or hydraulic requirements and service interfaces. | Match plant utilities and machine connections to create a clear installation interface. |
| Trial and acceptance | Approved resin and color, machine used for trial, sample quantity, inspection items, trial evidence and acceptance responsibility. | Agree what will be measured and what evidence will be delivered before shipment, rather than deciding after the trial. |
| Packing and documentation | Drawings, component list, controller information, operation/maintenance material, packing protection and shipping documents. | List required documents and packing conditions inside the quotation so they are part of the commercial scope. |
Cavity decision
A higher cavity count can raise production potential, but it also increases mold size, shot demand, cooling load, hot-runner complexity, spare-parts exposure and maintenance responsibility. The correct shortlist is the one the plant can run and support consistently.
| Cavity | When to review it | Project checks |
|---|---|---|
| 24 | Useful when investment control, manageable maintenance and a moderate production plan matter more than maximum hourly capacity. | Compare against 32 and 48 cavities using the same preform drawing, cycle assumption and operating hours. |
| 32 | A balanced option when the project needs more capacity than 24 cavities and a more compact production platform than 48 cavities. | Use shot requirement, mold envelope, neck finish, weight and actual demand to establish the 32-cavity production case. |
| 48 | A serious production option for projects with proven demand and a machine capable of supporting the mold and hot-runner scope. | Give greater attention to filling balance, cooling, weight consistency, controller zones, trial evidence and service parts. |
| 64 / 72 | Consider when the capacity gain over 48 cavities is commercially justified and the plant can support higher technical and maintenance demands. | Review machine fit, utilities, handling, spare-parts plan and acceptance criteria before treating price as the deciding factor. |
Process-critical scope
The hot-runner section of a quotation should identify more than the words hot runner or valve gate. Buyers need enough detail to understand the configuration, controls, maintenance boundary and spares that support the proposed cavity count.
Installation readiness
Machine compatibility begins during quotation and continues through the final installation review. Provide the machine model and technical sheet so mold size, shot requirement, opening movement and control interfaces share one design basis.
Machine check 1
Tie-bar spacing, platen dimensions, mounting arrangement, minimum and maximum mold height, opening stroke and ejection or take-out clearance.
Machine check 2
Total shot demand based on confirmed preform weight, cavity count and process allowance, together with the relevant injection-unit capability.
Machine check 3
Hot-runner control zones, connector standard, power, cooling-water connections, pneumatic or hydraulic services and plant conditions.
Machine check 4
Mold weight, lifting and installation plan, preform take-out, downstream handling, maintenance access and safe component replacement.
Commercial control
A lower number can result from a different material specification, runner scope, spare-parts package, trial obligation, documentation level or delivery basis. Normalize the scope first so a commercial comparison reflects the mold you expect to receive.
Are drawing revision, weight, neck finish, cavity, application and machine model identical in every quote?
Are mold components, material grades, treatments, interchangeability and purchased parts clearly identified?
Are manifold, nozzles, valve-gate system, zones, connectors, controller and spares included on the same basis?
Are trial material, machine, duration, samples, measurements, visual checks, video and acceptance responsibility defined?
Are drawings, manuals, spare parts, packing, shipping basis, warranty boundary and response path included?
Evidence before shipment
The exact acceptance standard belongs to the project drawing and commercial agreement. A practical evidence path makes the later decision easier and prevents buyer and supplier from applying different assumptions after the mold is complete.
Evidence 1
Freeze the drawing revision, resin, color where relevant, neck finish, target weight, machine and agreed operating conditions used for the trial.
Evidence 2
Review gate condition, flash, haze or whitening, contamination, incomplete filling and other appearance items relevant to the approved preform.
Evidence 3
Record the agreed dimensions, weight checks, cavity comparison and sampling method against the approved project specification.
Evidence 4
Compile the sample quantity, trial video or images, measurement record, component list, approved changes and completed packing-release items.
Evidence 5
Verify preservation, protected components, loose parts, controller or accessories, documents, packing list and crate condition before release.
Project path
The project schedule is built from the approved specification, production scope and acceptance plan. Each step shows the decision, owner and evidence that moves the mold toward shipment.
01
Collect the drawing or sample information, application, weight, neck finish, output plan, cavity preference, machine model and destination.
02
Organize the available data, resolve conflicting inputs and record the working basis used for the proposal.
03
Present the recommended configuration, scope, exclusions, trial basis, documentation, packing and commercial terms on a comparable basis.
04
Review the technical definition and record approved revisions so production follows one controlled requirement.
05
Track agreed milestones, changes, open issues, trial preparation, sample evidence and acceptance actions.
06
Close the evidence list, verify included items and documents, confirm packing, and maintain one communication path through shipment.
Inspect the details
Clear, accurately captioned images let buyers inspect construction, component scope and service access before quotation. The gallery connects each visual detail to a project decision.
Start the review
Name, country, a short requirement and either email or WhatsApp are enough to start. Add the application, cavity, weight, neck finish, machine, target output and drawing when available. We will organize the information into the next technical and quotation steps.
Buyer questions
These answers define the information and comparison method used on this product page. Project-specific values are finalized in the drawing, proposal and commercial agreement.
Start with the preform drawing or sample details, bottle application, preform weight, neck finish, preferred cavity count, injection-machine model, target output and destination country. Available items establish the first review, and remaining items are organized into a focused project checklist.
Compare target output, operating hours, confirmed preform weight, machine capacity, mold envelope, cooling, hot-runner complexity, maintenance resources and investment. A higher cavity number is useful only when the plant and demand can support it. Review neighboring options on the same assumptions before choosing.
The quotes may use different component materials, hot-runner and valve-gate scope, control systems, spare parts, trial obligations, documentation, packing, delivery basis or warranty boundaries. Normalize those items before treating the total price as a like-for-like comparison.
Provide the machine model and technical sheet showing platen and tie-bar space, mold-height range, opening stroke, injection-unit capacity, hot-runner controller information, utility connections and take-out arrangement. The final review uses the proposed mold drawing and the actual machine specification.
Specify the manifold and nozzle configuration, heater and thermocouple zones, actuation method, connectors, controller requirement, maintenance access, included electrical and wear spares, and the trial checks used to review filling and gate condition.
Agree the approved drawing and trial basis, sample quantity, appearance checks, project-specific dimensions, weight and cavity sampling method, trial images or video, measurement record, component and spare-parts list, documentation, preservation, packing list and crate condition. The commercial agreement should define final acceptance.
Choose by bottle application
Each application page keeps its own bottle requirements and project questions. Use this core page when the application is still open.
Application page
Review preform weight, neck finish, cavity direction and production requirements for water-bottle projects.
Application page
Define the bottle application, closure interface, production plan and acceptance basis for beverage projects.
Application page
Review large-opening container requirements, neck geometry, preform definition and machine fit.
Application page
Organize appearance, color, neck, weight and project evidence for cosmetic-bottle applications.
Application page
Connect edible-oil bottle requirements with preform weight, handling and mold configuration.
Application page
Review heavy-preform requirements, shot demand, cooling, machine capacity and trial scope.
Continue the technical review