72 Cavity PET Preform Mold
CHMOULD offers custom 72-cavity PET preform molds for PET bottle packaging production. Each mold is designed to form 72 preforms per injection cycle.
The proposed range covers preform weights from 5 to 45 g and neck sizes of 15, 18, 20, 24, 28, and 30 mm, depending on the selected design. Applications include water, beverage, and personal care bottle preforms.
A valve-gated hot runner and dedicated cooling circuits form the basis of the proposed configuration. Before manufacturing, the preform geometry, machine capacity, installation dimensions, and production requirements are reviewed together.
Send us your preform drawing and machine specifications for a project quotation.
Proposed Technical Specifications
| Item | Proposed Specification |
|---|---|
| Product Name | 72 Cavity PET Preform Mold |
| Molding Process | Injection Molding |
| Cavity Count | 72 Cavities |
| Preform Material | PET |
| Neck Size Options | 15 / 18 / 20 / 24 / 28 / 30 mm |
| Preform Weight Range | 5–45 g, subject to preform design and machine review |
| Neck Finish | Defined by the approved neck drawing |
| Runner System | Balanced Hot Runner |
| Gate Type | Pin Valve Gate |
| Core & Cavity Steel | S136 Stainless Steel |
| Core & Cavity Hardness | Target HRC 49–51 |
| Mold Plate Material | 4Cr13 |
| Neck Release | Split Neck Rings |
| Ejection System | Stripper Plate |
| Cooling System | Separate Core and Cavity Cooling Circuits |
| Cavity Layout | Confirmed according to preform dimensions and machine installation requirements |
| Mold Dimensions | Defined in the approved mold drawing |
| Machine Compatibility | Reviewed for shot capacity, clamping requirements, installation dimensions, and operating connections |
| Delivery Schedule | 60Days |
| Warranty | 1 Year |
The listed neck sizes and weights describe proposed design options. Not all combinations are available with every mold configuration or injection molding machine.
Design Priorities for 72-Cavity Production
Filling Across 72 Cavities
The runner layout, gate configuration, and processing requirements are reviewed for the approved preform. Mold trials are used to assess filling and preform consistency across the cavities.
Cooling and Cycle Development
Cooling circuits are designed around the core, cavity, and neck areas. The achievable cycle time is evaluated using the selected preform, machine, and cooling conditions.
Machine Matching
The review includes more than clamping force. Shot capacity, tie-bar spacing, platen dimensions, mold height, opening stroke, and utility connections must also suit the proposed mold.
Maintenance Planning
The design review addresses access to neck rings, cores, gate components, and cooling connections. Spare-part requirements are agreed according to the selected configuration.
Information Required for Machine Matching
Please provide:
Injection molding machine brand and model
PET shot capacity and injection specifications
Clamping force
Tie-bar spacing and platen dimensions
Permitted mold height and opening stroke
Ejector specifications
Electrical, pneumatic, and cooling connections
Proposed Project Workflow
Review the preform drawing, neck finish, target weight, and machine specifications.
Agree on the mold configuration, quotation, and acceptance requirements.
Approve the preform and mold drawings.
Manufacture and assemble the mold.
Conduct mold trials and inspect samples against the agreed criteria.
Confirm acceptance, documentation, spare parts, and delivery arrangements.
Frequently Asked Questions
How many preforms are produced per cycle?
The mold is designed to produce 72 preforms per injection cycle. Actual output depends on the validated cycle time, operating efficiency, and accepted product rate.
What hourly output can I expect?
Theoretical hourly output is calculated as:
72 × 3,600 ÷ cycle time in seconds.
For example, a validated 15-second cycle would give a theoretical output of 17,280 preforms per hour. This is a calculation example, not a guaranteed cycle time or production rate.
Can the mold produce different neck finishes or weights?
Changes may require replacement components or a revised mold design. Conversion feasibility must be reviewed using the required preform drawings.
What injection molding machine is required?
Machine selection depends on the preform weight, total shot requirement, mold dimensions, and operating requirements. A machine model cannot be selected from cavity count alone.
What is needed for a quotation?
Please send your preform drawing or sample details, neck finish, target weight, injection molding machine specifications, and required production output.
Request a 72 Cavity PET Preform Mold Quote
Contact CHARMOULD with your project details. We will review the proposed configuration and prepare a quotation based on the agreed technical requirements.
Request a Quote
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