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Jar Preform Mould
Jar Preform Mould is designed for high-volume production of PET preforms used for wide-mouth jars in food packaging, cosmetics, and household chemical containers.
Description
Product Overview
Jar Preform Mould is designed for high-volume production of PET preforms used for wide-mouth jars in food packaging, cosmetics, and household chemical containers.
The mold is engineered for stable multi-cavity performance, consistent cavity balance, and long-term operation in continuous injection molding environments. It is suitable for production lines requiring repeatable output quality and controlled cycle efficiency.
Technical Advantages
Machined from genuine Swedish ASSAB S136/718H steel (HRC 48-52) to ensure a stable production lifespan of over 3,000,000 shots.
Built with independent, multi-channel water cooling in every cavity to maintain a fast, uniform cycle time of 12-15 seconds.
Processed via Japanese Mazak and Makino CNCs to keep concentricity under 0.05mm, preventing wall thickness variation and bottle bursting.
Utilizes a pneumatically-actuated valve gate hot runner system to ensure clean, tail-less gates and minimize material waste.
Applications
Food Packaging
Peanut butter jars, candy containers, spice containers
Cosmetics & Personal Care
Cream jars, hair masks, body scrub containers
Household Chemicals
Detergent jars, cleaning product containers
Manufacturing Capability
Our molds are produced in an integrated manufacturing environment covering machining, heat treatment, assembly, and testing.
Main processes include:
Design → Mold flow analysis → CNC machining → EDM machining → Heat treatment → Assembly → Trial testing → Final inspection
Quality control is carried out using precision measurement equipment such as CMM (Coordinate Measuring Machine) to verify dimensional accuracy and cavity consistency before shipment.
Each mold is subjected to trial operation before delivery to evaluate cavity balance and forming stability under production conditions.
Quality Verification
Before shipment, each mold is validated through:
CMM dimensional inspection for cavity and core accuracy
Trial molding with sample preforms for dimensional consistency checks
Cooling channel performance observation under continuous operation
Gate quality and hot runner temperature stability verification
Inspection records, trial videos, and sample preforms can be provided for production validation purposes.
FAQ
Q: What steel and hot runner system are used?
A: ASSAB S136 / 718H tool steel (or equivalent depending on application) with hardness controlled at HRC 48–52, and a valve gate hot runner system with individual temperature control.
Q: What is the expected mold life and cycle time?
A: The mold is designed for a service life of over 3,000,000 cycles under standard production conditions. Typical cycle time is approximately 12–15 seconds depending on machine and process setup.
Q: How is mold quality verified before shipment?
A: Each mold undergoes a minimum 4-hour continuous trial run. We provide trial videos, molded samples, and CMM inspection reports to verify dimensional stability and cavity consistency.
Q: What maintenance and spare parts support are provided?
A: Modular insert design is used to support easier replacement of wear components. A standard set of wear parts (such as heaters, thermocouples, and nozzles) is provided based on project requirements.
Q: How is wall thickness consistency controlled?
A: Wall thickness stability is achieved through precision CNC machining (±0.005–0.01 mm on critical areas) and controlled concentricity during assembly. Final validation is performed during trial molding.
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