How many cavities do I need, and which machine runs them?
As a first estimate, cavities ≈ required preforms per hour × cycle time in seconds ÷ 3,600. Then check cavities × preform weight against the PET shot weight of each HMD-PET model. The cavity table shows pairings recorded in customer mold trials, such as 48 × 15.2 g on the HMD320PET and 96 × 15.2 g on the HMD500PET.
Which neck finishes can the mold produce?
PCO 1881, PCO 1810, 29/25 and 30/25 are standard. Other finishes are made to your controlled neck and closure drawing.
Which steel is used for a PET preform mold?
It depends on the mold level. Economy molds use S136 cores, cavities and neck rings on a P20 base; standard molds use S136 or M333 on a P20 or 420 stainless base; high-output molds use M333 hardened to HRC 48–51 on a 420 stainless base. The level is agreed in the quotation, and the approved mold drawing records the final material schedule, including the lock rings.
Does the mold use a valve-gate hot runner?
Yes. Every cavity has a valve gate, and manifold and nozzle temperatures are controlled by zone. Valve pins, nozzles and insulators are part of the spare kit.
How is the cycle time validated?
At the T1 trial on the matched machine. The cycle is recorded together with the PET resin, cooling-water condition and process settings, and delivered with the inspection record.
How are preform weight and dimensions checked?
One preform from every cavity is weighed, and its neck dimensions, gate and appearance are inspected. The acceptance limits come from your approved preform drawing and are agreed before the trial.
Can my existing mold run on an HMD-PET machine?
Send the mold drawing or dimensions, weight, cavity count, preform weight and hot-runner data. The mold is checked against tie bars, mold thickness, shot weight, ejection and controls, and can run on the machine in the trial before shipment.
What are the stages from drawing approval to T1?
Mold drawing approval, manufacture and hardening of the stack, mold and hot-runner assembly, then the T1 trial on the matched machine. The quotation sets the date of each stage for your cavity count.
What do I receive after the mold trial?
A cavity-numbered sample set, an inspection record, a process record with the measured cycle, a trial video and, when required, bottle blowing results. Mold drawings, the component list and maintenance instructions ship with the mold.
Which spare parts come with the mold?
A standard spare kit is included: cavity inserts, cores, neck rings, gate inserts, valve pins, nozzles, insulators, temperature-control cards, a solenoid valve, water connectors and seals. Quantities scale with the cavity count.
What drives PET preform mold price?
Cavity count, preform size, neck finish, hot-runner scope and the trial and acceptance scope. Every mold is quoted for the project, FOB Ningbo.
HWAMDA
