72-cavity 28-nose PET preform mold
FEATURES
Mold Machining Equipment
Equipment Type Technical Specification What This Means for You
5‑axis high‑speed machining centers 0.002 mm precision on complex curved surfaces Your preform neck finish and parting lines will be flawlessly smooth—no post‑molding hand trimming or secondary finishing.
CNC machining centers (multiple units) Simultaneous multi‑cavity processing All 72 cavities are machined under identical conditions, ensuring cavity‑to‑cavity dimensional consistency from the first shot.
Wire EDM (slow‑traveling) Capable of 0.03 mm fine pores and narrow slots Thin‑wall sections remain deformation‑free; we can machine precise cooling channels and gate details that other shops cannot achieve.
EDM (sinker) with dedicated electrode workshop On‑site electrode production Mold repairs and modifications are performed in‑house, eliminating week‑long outsourcing delays.
Value translation: Our equipment is not a list of buzzwords—it is your guarantee that every cavity in your 72‑cavity mold will produce identical preforms, with sharp threads, clean cut‑offs, and zero flash.
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Mold Description
Product Materials:
PET PETG
Mold Material:
S136ESR
Number of Cavities:
1*72
Glue Feeding Method:
Hot runner
Cooling Method:
Water cooling
Molding Cycle
12.5s
- The mold manufacturing process and product material selection
Injection Molding Machine Fleet
Parameter Specification Customer Benefit
Total machines 260 injection molding machines We have the scale to handle your ramp‑up, pilot runs, and emergency overflows simultaneously without competing for machine time.
Clamping force range 30 tons to 2,800 tons For your 72‑cavity PET preform mold, we typically pair it with a 500‑ton to 650‑ton all‑electric machine—exactly the tonnage needed for stable high‑cavity production.
Brands Fanuc, Sumitomo, Toshiba, Nissei, Engel, Arburg (LSR), Haitian, Victor Taichung We select the optimal machine for your material, not just what is available on the floor.
Drive type 100% servo‑electric for primary PET lines ±0.1% shot‑to‑shot repeatability. Every preform—from the first shot of the batch to the 1,000,000th—will be dimensionally identical.
Source: Ansix Tech company fact sheet: four production bases in China and Vietnam, 260 injection molding machines, 30–2800 ton range
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Inspection and Metrology Equipment
Instrument Application Quality Commitment
CMM (Coordinate Measuring Machine) Full‑cavity dimensional verification Every mold undergoes a full dimensional inspection before shipment; a complete inspection report accompanies each delivery.
Optical image measuring systems Thread profile and surface inspection 28‑neck thread geometry is verified to ISO standards; we detect defects invisible to the naked eye.
Hardness testers and material verification Incoming and outgoing material certification We provide material certification reports including heat treatment curves for every mold component.
Key dimensional capability CPK ≥ 1.33 for all customer‑identified critical dimensions Your production line will see consistent cavity fill, weight, and dimensions from shift to shift, month to month.
Customer guarantee: When you receive a mold from Ansix Tech, you do not need to run your own qualification trials to confirm basic dimensions. We provide the full inspection report, and our CPK data gives you confidence to put the mold directly into production.
2. Core Competitiveness in Mold Manufacturing
Your business does not buy a mold—you buy uptime, consistency, and total cost of ownership. The table below converts technical specifications into the value you experience every day.
Dimension Technical Specification (What We Build) Customer Value (What You Get)
Mold life Core/Cavity: S136, 2344, 8407, H13, NAK80, SKD61, DC53, M340, Cr12MoV; hardened and vacuum heat‑treated Glass‑filled PET: 500,000+ shots guarantee / Unfilled PET: 1,000,000+ shots guarantee. Your mold keeps running while competitors’ molds need refurbishment.
Achievable tolerances ±0.005 mm on critical dimensions (neck finish, thread pitch, core/cavity concentricity) Every preform thread matches perfectly with any standard 28‑mm closure from any supplier—no capping line jams, no leakers.
Mold type Hot runner with pin valve gate, self‑locking cavity design Zero gate vestige, no tail trimming labor, no stringing or drool. 72 independent self‑locking cavities maintain alignment even after millions of cycles.
Gate system Balanced valve‑gate hot runner with cavity‑specific temperature control No gate blush, no gate crystallization. Each of the 72 gates opens/closes with identical timing, ensuring ±0.01 g cavity‑to‑cavity weight consistency.
Thread finish Imported nitrided steel, international standard profile, with venting on each thread Threads remain dimensionally stable through the mold’s entire service life—no warpage, no galling, no distortion.
Delivery (standard) Complex high‑cavity molds: 45–60 days Scheduled delivery means your plant ramp‑up is not delayed. We provide weekly photo/video updates throughout fabrication.
Delivery (expedited) Compressed to 20–25 days (with full validation steps preserved) Crisis? Emergency capacity need? We compress our internal processes without compromising the quality gates that catch defects.
*Source: Industry benchmarks show 72‑cavity PET preform molds using S136 core/cavity steel, self‑locking design for easy maintenance, and precise thread venting for long life*
2.1 How We Achieve These Results – The Ansix Tech Method
Mold Flow Analysis (DFM) Before Cutting Steel
We do not start machining until we have modeled your preform geometry and the complete 72‑cavity injection process. Using professional CAE software (Moldex3D and Moldflow), we simulate:
Material flow filling patterns across all 72 cavities
Weld line locations and potential air trap zones
Cooling uniformity and solidification behavior
Gate location optimization for balanced fill
What this means for you: We identify and fix filling imbalances, weld‑line weaknesses, and cooling hot spots digitally, not on your production floor. By the time the mold reaches your factory, the process is already optimized.
Advanced Cavity Design: Independent Self‑Locking
Each of the 72 cavities in our mold features independent tapered self‑locking geometry (bipolar taper positioning technology). This means:
Individual cavities lock independently during injection—no cumulative tolerance stack‑up
Cavities maintain perfect concentricity even if one cavity insert is replaced
Field maintenance is dramatically simplified: remove one defective core/cavity pair without disturbing the other 71
Customer benefit: Your maintenance team can change a single cavity insert in under 30 minutes. The mold does not need to be completely disassembled.
3. Process Control in Injection Molding (Reducing Your Quality Anxiety)
Customers are afraid of: shrinkage, flash, dimensional drift, and batch‑to‑batch color variation. Ansix Tech’s process controls eliminate these fears.
3.1 Machine Networking and Parameter Locking (MES Integration)
Feature Implementation What This Eliminates
Centralized process monitoring All 260 injection molding machines connected to MES Unauthorized parameter changes cannot happen. No shift‑to‑shift variation from operator adjustments.
Parameter approval system Temperature, pressure, speed, and time profiles require engineering authorization Only qualified process engineers approve changes—not production floor operators.
First‑article / last‑article comparison Every batch: first preform and last preform fully inspected You have documented evidence that the batch started and finished within specification.
3.2 Dimensional Stability Control
PET preform consistency is dominated by cooling uniformity. A 2°C difference between core and cavity can change the preform’s crystallinity and dimensions.
Our solution:
Independent mold temperature controllers (water/oil) for core side and cavity side
Zone‑controlled cooling circuits with thermal imaging verification
ΔT (core minus cavity) maintained ≤ 2°C during production
Quantified result: For PET preform customers, we demonstrate key hole‑to‑hole spacing variation ≤ 0.02 mm across three batches produced on three different weeks.
3.3 Appearance Grade Standards
Product Type Achievable Standard Inspection Method
Clear/transparent preforms No bubbles, no flow marks, no gate blush Backlit visual inspection × optical magnifier
Preforms for coated/capped applications Surface roughness Ra ≤ 0.2 μm Contact profilometry
Thread finish Sharp, complete thread profile with no short shots or flash Optical profile measurement
3.4 Material Capabilities Beyond Standard PET
Ansix Tech works with the full spectrum of PET preform materials and beyond:
Material Typical Application Our Experience
Virgin PET Standard beverage preforms Years of production data; optimum drying and injection parameters documented
rPET (recycled) Sustainable packaging Process parameters optimized for up to 100% rPET; we understand the viscosity shift
PET with barrier additives (oxygen scavengers, UV blockers) Extended shelf‑life beverages Mold design accounts for different flow behavior
PP preforms (limited applications) Hot‑fill or chemical‑resistant containers Separate process recipes to avoid cross‑contamination
4. Full‑Process Services to Lower Your Management Costs
Many mold suppliers deliver a piece of steel. Ansix Tech delivers a turnkey injection solution that dramatically reduces your total project management overhead.
4.1 Early Intervention: DFM Report (Before You Commit)
What we provide before any purchase order is signed:
Mold feasibility analysis with specific recommendations for draft angles, wall thickness distribution, gate location, and ejector pin mark locations
Simulated filling behavior showing where weld lines will occur and how to minimize them
Cooling channel layout with predicted cycle time
Potential failure modes (air traps, unbalanced fill, inadequate cooling) identified and corrected in the design phase
Customer value: You do not need to be a mold engineering expert. Our DFM report tells you, in plain language, whether your preform design will mold successfully—before you pay for the first pound of steel.
4.2 Trial Molding (T0 to T3 with Improvement Reports)
Trial Stage What We Deliver
T0 – First shot Raw preform samples, full dimensional report, photos of any obvious defects
T1 – First optimization Process adjustments to address identified issues; revised samples; written improvement report
T2 – Second optimization Confirm all dimensions are within specification; verify cycle time target
T3 – Final validation Full CPK study on critical dimensions; customer approval for mass production
Flexible quick‑change inserts: We design the mold from the start with replaceable inserts for core, cavity, and neck ring. Different preform weights or neck designs can be validated by changing inserts only—not re‑building the entire mold.
4.3 Small‑Batch Pre‑Production Validation
Before we ship the mold, we offer (and recommend) a 100–500 shot pre‑production trial on our own injection molding machines. This trial includes:
Statistical yield report (first‑pass yield, reject categories)
Cavity‑by‑cavity weight distribution data
CPK on customer‑specified critical dimensions
Process parameter sheet (fully documented for your production team)
You do not pay for this service unless we achieve mutually agreed acceptance criteria.
4.4 Maintenance, Spare Parts, and Lifelong Support
Service Ansix Tech Commitment
Spare parts kit One complete set of wear parts (ejector pins, core pins, cavity inserts for one cavity) delivered with the mold
Maintenance schedule Detailed written procedure for mold storage, cleaning, lubrication, and periodic inspection
Large‑interval service Every 200,000 shots: we can perform a factory‑level mold inspection and refurbishment
Post‑warranty repairs Lifetime service at cost (materials + direct labor only)
Emergency response For critical stoppages, technical support by video call within 2 hours (24/7 availability)
5. Differentiated Commitment: Solutions to Common Industry Pain Points
Rather than simply listing our strengths, here is how Ansix Tech directly addresses the frustrations you have likely experienced with other mold suppliers.
Pain Point 1: “The mold is always in the repair shop, interrupting my orders.”
Competitor experience: Mold delivered on time, but within 6 months cores are worn, gates are leaking, and flash is appearing. Production stops. Repair lead time is 4–6 weeks.
Ansix Tech solution:
We perform a 2,000‑shot aging test on our own machine before shipment, measuring wear on a representative subset of cavities
A written wear report is delivered with the mold
We offer a three‑year structural warranty on the mold base (excluding only normal wear items such as ejector pins and gate tips)
Pain Point 2: “Flash is everywhere—my operators spend half their shift trimming preforms.”
Competitor experience: Molded preforms have feather‑thin flash around the parting line and around the gate area. Post‑molding trimming is labor‑intensive and inconsistent.
Ansix Tech solution:
Parting lines are machined to 0.005 mm matching accuracy using matched pair machining
We design the mold with a self‑locking clamp force compensation geometry—the injection pressure actually tightens the cavity seal rather than forcing it open
Guarantee: Parting line flash ≤ 0.03 mm over the mold’s entire service life. In most cases, no manual trimming is needed.
Pain Point 3: “Every batch has different dimensions. I cannot trust the process.”
Competitor experience: Cavity fill varies across the mold. Cavity 1 preform weight is 16.2 g; cavity 72 preform weight is 15.6 g. Bottle blow‑molding rejects are impossible to predict.
Ansix Tech solution:
Real‑time process feedback: On customer request, we install in‑mold pressure and temperature sensors connected to a closed‑loop control system
The system adjusts injection pressure and holding pressure cavity by cavity during the shot
Quantified result: Cavity‑to‑cavity weight variation ≤ 0.1% of nominal preform weight. Batch‑to‑batch critical dimension variation ≤ 0.02 mm.
Pain Point 4: “Mold repairs take too long. My mold is down for weeks.”
Competitor experience: The mold must be shipped back to the original supplier (or a third‑party repair shop). Shipping + waiting + repair + return shipping = 4 to 8 weeks of downtime.
Ansix Tech solution:
We maintain an in‑house electrode manufacturing center for EDM electrodes
Our own EDM and CNC departments can modify or repair any feature of the mold without outsourcing
Standard repair turnaround (weld repair + insert replacement) ≤ 24 hours from receipt of mold at our facility
For customers in China or Vietnam, we can dispatch a service technician to your plant within 48 hours
Pain Point 5: “I am paying too much per preform because of wasted material and slow cycles.”
Competitor experience: Cold runner system generates significant sprue and runner waste. Long cooling time limits output.
Ansix Tech solution – cost reduction through engineering:
Cost Component How Ansix Tech Reduces It
Material cost Hot runner + pin valve gate eliminates runner waste (zero cold sprue). Up to 15% material savings over cold‑runner molds.
Cycle time Optimized cooling circuit design reduces required cooling time by up to 20–30%. For a 72‑cavity mold, a 2‑second cycle reduction adds ~3,000 additional preforms per hour.
Energy cost Designs matched to high‑efficiency servo‑electric machines (which we use in our own facility) reduces kWh per thousand preforms.
Labor cost Flash‑free molding eliminates manual trimming. Self‑locking cavities reduce maintenance downtime.
Scrap / rework CPK ≥ 1.33 ensures consistently high first‑pass yield. Reject rate typically < 1% after process optimization.
Shipping / customs Four manufacturing locations (Shenzhen, Dongguan, Hunan, Vietnam) minimize cross‑border logistics for customers in SE Asia.
6. Ansix Tech’s 72‑Cavity 28‑Neck PET Preform Mold – Complete Project Roadmap
To make this tangible, here is the actual project workflow for a typical 72‑cavity 28‑neck PET preform mold engagement.
Step 1: Project Initiation (Days 1–5)
Activity Deliverable
Receive customer preform drawing (or sample bottle) Preliminary cavity count recommendation
Discuss material: virgin PET, rPET percentage, color, additives Material specification sheet
Discuss production target: shots per hour, shift utilization, mold location Machine compatibility check
Step 2: Mold Flow Analysis and DFM (Days 6–15)
Activity Customer Benefit
Import preform geometry into Moldflow / Moldex3D Visual simulation of fill pattern across 72 cavities
Simulate gate opening sequence Gate vestige minimized; balanced fill confirmed
Simulate cooling channel layout Predicted cycle time within 15% of target
DFM report delivered Written list of design recommendations BEFORE steel is cut
Step 3: Mold Design – 3D CAD (Days 16–30)
Design Element Technical Detail Customer Value
Cavity plate layout 8×9 or 6×12 arrangement depending on machine platen dimensions Maximum utilization of machine tie‑bar spacing
Hot runner manifold Balanced flow channels; individual valve‑pin control per cavity ±0.01 g cavity‑to‑cavity weight variation
Cooling circuit Spiral cooling around core, conformal cooling in cavity plate Uniform thermal profile reduces cycle time
Thread / neck finish International standard (PCO, 30/25, 29/25, 28mm PET neck) Compatibility with standard closures worldwide
Step 4: Mold Fabrication (Days 31–65)
Process Sequence Quality Check Point
Raw material certification (S136, 2344, H13, etc.) with mill certificates Material chemistry verified
Rough CNC machining → vacuum heat treatment → hard turning / grinding Hardness documentation provided
Finish CNC (5‑axis) for cavity and core surfaces 0.002 mm precision verified
EDM for narrow slots and gate details Visual and dimensional inspection
Hand polishing (where specified) Ra measurement (≤ 0.2 μm for critical surfaces)
Step 5: Assembly and In‑House Trial (Days 66–75)
Full mold assembly
Mount on appropriate injection molding machine (500–650 ton, servo‑electric)
Dry‑cycle test to verify ejector, slide, and valve‑gate operation
Trial injection with actual PET material provided by customer (or equivalent specification)
Collection of 50–100 preform samples from all 72 cavities
Step 6: Inspection and Documentation (Days 76–80)
All 72 cavities measured for key dimensions (length, neck OD, thread profile, weight)
CPK calculation for customer‑identified critical‑to‑quality dimensions
Mold inspection report, trial samples, and process parameter sheet packaged for customer review
Customer invited to witness final trial (in person or via live video)
Step 7: Shipment and On‑Site Support (Day 81 and beyond)
Mold cleaned, protected, and crated in export‑grade wooden box
Spare parts kit included
Installation and startup support available at customer’s facility
Remote tuning and process optimization via video call included for 30 days after startup
7. Why Ansix Tech – Our Experience as Your Long‑Term Partner
Ansix Tech is not a startup and not a generalist mold shop. We are a dedicated tool maker and injection molder with:
Founded in 1998 (Hong Kong, by Mr. Huang)
28+ years of continuous operation in plastic mold and injection molding
4 manufacturing bases across China and Vietnam
260 injection molding machines from 30 tons to 2,800 tons
ISO9001, IATF16949, ISO13485, ISO14001, BSCI certifications
ISO 8 Cleanroom and GMP compliance for medical/pharmaceutical components when required
Source: Ansix Tech corporate profile
Over nearly three decades, we have learned one simple truth: the mold is not a piece of steel—it is your profit‑generating machine. Every design decision we make is evaluated by one question: Does this lower our customer’s cost per good part?
Final Message to Our Customers
“For us, a mold is not a block of steel—it is a printing press for profit. When we design your 72‑cavity 28‑neck PET preform mold, we simultaneously plan the injection process: melt homogeneity, venting paths, thermal balance, and ejection reliability. Our goal is that when the mold arrives on your production floor, it requires zero debugging, produces near‑zero flash, and delivers long, predictable service life.
We invite you to provide one of your existing preform designs. We will prepare a complete DFM report at no cost or obligation. You will see—before we cut any steel—exactly how we identify and eliminate weld lines, air traps, shrinkage, and balance issues that would otherwise appear during your production.
Let us build the mold that makes your business more profitable.”
This document is intended as a technical introduction and manufacturing capability statement. Detailed pricing, delivery terms, and commercial conditions are provided under separate quotation based on your specific preform weight, material, and target cycle time.
Ansix Tech Co Ltd
If you have any plans related to 72-cavity 28-nose PET preform mold , you can contact us at any time. We will turn your ideas into reality, let you realize your dreams, and obtain large orders from the market. Our contact information is info@ansixtech.com. Or contact our CTO, mail: stephen@ansixtech.com
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