Email Us For Details
sales@daobenmachinery.com
24/7 Customer Support
+8613967807860
sales@daobenmachinery.com
+8613967807860
The Daoben PET series is a dedicated high-speed injection molding machine built specifically for PET preform production. It is based on the M8SII platform and developed around four core principles: precision, reliability, stability, and speed. Every design decision — from the 25:1 L/D screw to the newly engineered clamping structure — targets the specific demands of preform production. Water bottles, carbonated beverage bottles, oil bottles, and wide-mouth jar preforms all run on this machine. Four models cover clamping forces from 2180 kN to 7000 kN, with compatible preform moulds from 16 to 72 cavities.
Precision
Reliable
Stable
Fast & Professional
The structure uses high-rigidity construction to give stable, efficient clamping performance and to lower the risk of contraction defects in the preform. The large mold opening stroke and wide mold thickness range mean the machine handles preform moulds of various sizes without modification.
The PET series is built with an extra-large ejection stroke to match. This avoids the need for pull-hook release, which slows the cycle and causes mold wear.
A closed-loop quantitative detection dilute oil lubrication system handles all lubrication points. Fixed-point lubrication reduces oil loss and improves lubrication reliability over long production runs.
The injection unit uses an integral moving bracket with optimized design. Force is more evenly distributed across the bracket during injection — so injection movement stays more precise.
The injection assembly uses a twin cylinder balanced system. This reduces oil return resistance during high-pressure injection and prevents overflow. Injection stays stable throughout fill and hold
The plasticizing drive uses a special enlarged hydraulic motor with backwashing and self-moistening functions. This ensures plasticizing stability throughout long production runs and extends motor service life significantly.
Total electricity usage is tracked and displayed continuously from the moment the machine begins operation.
Energy consumption is recorded and displayed for each individual production cycle. This makes it straightforward to compare power draw across different preform types, mould configurations, and process parameter settings.
Current power draw is shown live on the screen at all times. Any unexpected spike in power consumption is visible immediately.
The hydraulic circuit has been fully redesigned to reduce pressure loss across the entire oil flow path. Optimized pipe routing, valve placement, and flow channel geometry all work together to keep pressure drop between the pump and each actuator as low as possible. Lower pressure loss means the pump delivers more usable force to the clamping, injection, and ejection functions — without increasing motor power.
The redesigned hydraulic circuit gives the mold-open axis tighter, more repeatable positioning accuracy. Better pressure stability in the circuit means the moving platen decelerates and stops at the programmed position more consistently — shot after shot, across the full production run.
Mechanical protection, electrical protection, and hydraulic protection all operate simultaneously and separately from each other. If one layer detects a fault, the other two remain active. This redundancy is important on a high-speed machine running long shifts
The control system supports mould needle valve open and close control directly from the interface. Multiple control modes are available for selection — so the operator can match gate control behaviour to the specific preform design and mould configuration.
The controller includes a packaging count program, alarm notification, and a conveyor belt transfer interface as standard. These are built into the base software — not optional add-ons.
Most injection machines on the market handle PET preform as one application among many. The Daoben PET series is designed from the ground up for preform production only.
The dedicated PET screw runs a 25:1 L/D ratio with special material, dedicated heat treatment, and a chrome-plated surface. This combination improves melt homogeneity, raises product transparency, and lowers the AA (acetaldehyde) value of the preform.
Oil bottle preforms, 3-gallon bottle preforms, and wide-mouth jar preforms are longer and harder to release than standard water bottle preforms. Most standard machines address this with pull-hook release — which is slower, harder on the mould, and limits cavity count.
High-cavity PET moulds fill at high injection pressure across a wide runner distribution. Any imbalance in injection force at that pressure causes fill variation between cavities — which shows up as weight variation, dimensional inconsistency, and elevated reject rates.
Our molding machine is a professional solution in the injection molding process for your business. Cost optimization expert.
Process/Mold Analyse and Design
