Producing preforms for wide-mouth jars and cosmetic containers calls for a Jar preform mold that combines large cavity volumes with delicate neck details.
Large Cavity and Screw Thread Integration
A Jar preform mold often molds both a wide body and a thick, multi-start thread in the same cycle. The cavity volume is substantial, requiring a hot runner with a high melt delivery capacity. Our nozzle tips are designed with a large exit bore to fill the jar preform smoothly without hesitation marks on the thread profile.
Uniform Cooling of Broad Shoulders
The shoulder of a jar preform is prone to hot spots. Our Jar preform mold incorporates specialized baffle cooling in the shoulder region of the cavity, which drives water directly against the back of the steel. This targeted technique eliminates sink marks on the jar flat surface, producing a preform that gives a pristine appearance to the final container.
High Polish Non-Stick Finishes
Cosmetic jars must be flawless. The Jar preform mold uses a high-gloss polish followed by an FDA-compliant PTFE-nickel coating on all surfaces. This not only provides a luminous finish on the preform but also ensures easy ejection without the need for mold release sprays, keeping your cleanroom contamination-free.
Handling of High rPET Content
As the cosmetics industry moves towards sustainability, the Jar preform mold must handle post-consumer recycled PET. We use corrosion-resistant S136 steel and extra-large venting grooves to cope with the byproducts of rPET. With a Jar preform mold, you can confidently market your jars as part of a circular packaging solution.
High-Strength Clamp Plate Engineering
The plates of this preform mold are machined from pre-hardened alloy steel with a tensile strength exceeding 1,000 MPa. This rigidity prevents any flexure under the high injection pressures required for wide-mouth preforms, ensuring that the parting line stays perfectly sealed and no flash is generated.
Ordering Process
Inquiry & Requirement Discussion
Customers share production requirements, such as preform weight, neck size, cavity quantity, output capacity, and factory conditions.
01
Solution Proposal
Demark provides suitable machine and mold recommendations, technical configurations, layout suggestions, and quotations.
02
Technical Confirmation
Both parties confirm product drawings, technical specifications, production requirements, and project details.
03
Contract Signing & Deposit Payment
After contract confirmation, the customer arranges the down payment to officially start production.
04
Manufacturing & Production
Demark proceeds with machine manufacturing, mold processing, testing, and quality inspection.
05
Factory Testing & Shipment
Customers can inspect the equipment before shipment. After approval, the equipment is packed and shipped.
06
Installation & Training
Demark engineers provide installation, commissioning, and operator training support.
07
After-sales Support
Continuous technical service, spare parts supply, and remote support are available throughout the equipment lifecycle.
08
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