84mm Neck PET Preform with Spiral Neck, Food Grade
FEATURES
Customer Value Translation – What Customers Actually Care About
Before detailing processes and machines, let us state clearly: What matters to you is not our machinery specifications, but what those machines deliver for your business.
Your Concern How Ansix Tech Solves It Quantified Customer Benefit
Mold reliability and uptime 50–100% longer tool life (50,000–1,000,000+ shots) Less downtime, fewer replacements, lower total cost of ownership
Dimensional inconsistency All process parameters locked in MES; ±0.01–0.02mm part-to-part repeatability Zero assembly issues, lower scrap, consistent blow molding performance
Flash and post-finishing labor 0.005mm parting line fit, 0.03mm max flash Eliminate manual deflashing — save $0.01–0.03 per part
Long mold changeover Quick-change hot runner systems; standardized clamping interfaces 30–50% shorter changeover; gain 2–4 production hours weekly
Material cost volatility Lightweighting studies, scrap reduction (OEE >95%), rPET capability Reduce material consumption 3–8%; lower per‑unit cost
Regulatory / food safety risk ISO 8 Cleanroom, FDA-compliant food‑grade materials, full traceability Zero contamination risk; audit‑ready documentation
The rest of this document shows how we deliver these numbers — backed by 28 years of real‑world production data.
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Mold Description
Product Materials:
PET PETG
Mold Material:
S136ESR
Number of Cavities:
1*8
Glue Feeding Method:
Hot runner
Cooling Method:
Water cooling
Molding Cycle
22.5s
- The mold manufacturing process and product material selection
Product Introduction – 84mm Neck PET Preform with Spiral Neck, Food Grade
2.1 Product Overview
The 84mm neck PET preform is an intermediate injection‑molded component designed for subsequent stretch blow molding into wide‑mouth PET containers. The spiral neck finish incorporates precision threads molded to high tolerance, allowing secure closure engagement with tamper‑evident bands, while the flared base ensures optimal melt flow distribution during injection.
Key Product Features:
Neck finish: 84mm diameter with continuous spiral threading
Material: Virgin food‑grade PET resin (typically 0.80–0.85 IV)
Target applications: Wide‑mouth jars for nutritional powders, dry foods, spices, pharmaceutical containers, household chemical packaging
Post‑processing: Stretch blow molding into container volumes typically from 500mL to 5L
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Standard Gram Weights Available from Ansix Tech
Based on extensive mold manufacturing experience, Ansix Tech can produce 84mm neck PET preforms across a range of gram weights to suit diverse final container specifications. Industry research indicates that 84mm preform weight options include:
Neck Size Available Gram Weights (g) Typical Final Bottle Volume
84mm 50g 1–2L
84mm 55g 2–3L
84mm 60g 3–4L
84mm 68g 4–5L
84mm 75–90g 5–10L
Standard 84mm preforms for wide‑mouth jar applications commonly range from 30g to 68g, while heavy‑duty industrial containers may require 75g to 90g weights. Ansix Tech custom‑designs preform weight and wall thickness distribution to match your exact blow molding parameters and final container performance targets.
2.3 Material Selection and Properties
Ansix Tech uses only certified food‑grade PET resins that comply with international food contact regulations, including:
Typical Resin Specifications:
Property Value Range
Intrinsic Viscosity (IV) 0.80–0.85 dl/g
Acetaldehyde (AA) content < 1 ppm
Melting Temperature (Tm) ~250–260°C
Glass Transition Temperature (Tg) ~75–80°C
Compliance Certifications: FDA 21 CFR Section 177.1630, EU Food Contact Regulation (EC) No 1935/2004, China GB 4806.6–2016.
PET resin is polymerized from purified terephthalic acid (PTA) and monoethylene glycol (MEG), offering excellent clarity, impact resistance, gas barrier properties, and recyclability.
Part III: Manufacturing Process – From Resin to Finished Preform
3.1 Raw Material Drying and Handling
PET resin is hygroscopic. Prior to injection, the material must be dried to < 50 ppm moisture content to prevent hydrolytic degradation (IV drop). Ansix Tech employs:
Desiccant air dryers with dew point ≤ −40°C
Resin drying temperature: ~160–180°C (avoiding > 180°C to prevent yellowing)
Drying time: 4–6 hours
Metal contaminant removal via magnetic separators and sieve screens
3.2 Injection Molding Process Parameters
For 84mm neck PET preforms, the injection molding process is precisely controlled:
Parameter Typical Value
Barrel temperature profile (feed to nozzle) 270°C → 285°C
Melt temperature 280°C ± 10°C
Hot runner temperature 270–285°C
Mold cooling water temperature 7–12°C
Cooling time 3–8 sec (depending on wall thickness)
Injection pressure 80–150 MPa
Holding pressure 40–80% of injection pressure
Back pressure < 20 bar (to avoid shear degradation)
3.3 Cycle Time Optimization
Cooling time typically dominates the cycle. Ansix Tech’s optimized cooling circuit design (conformal cooling channels) reduces cooling time by 15–25% compared to conventional straight‑drilled cooling. For 84mm 50g preforms, total cycle times typically range from 8–14 seconds, depending on cavity count and part geometry.
Part IV: Hard Power Infrastructure – Building Customer Confidence Through Equipment Excellence
4.1 Mold Manufacturing Equipment
We transform your product concept into a precision tool using state‑of‑the‑art equipment:
Equipment Type Capability Customer Benefit
5‑axis high‑speed machining centers 0.002mm precision for complex 3D surfaces Parting lines are smooth and burr‑free; no secondary finishing
EDM sinker ±0.005mm electrode positioning Intricate threads and narrow slots produced defect‑free
Wire EDM (slow‑traveling) 0.03mm micro‑hole and narrow‑slot capability Thin‑wall sections prevent deformation under injection pressure
Coordinate Measuring Machine (CMM) Full dimensional inspection to 0.001mm Every mold cavity verified before shipment
Optical measuring system Fast non‑contact contour scanning 100% critical feature verification
4.2 Injection Molding Machine Fleet
Ansix Tech operates 260 injection molding machines with clamping forces ranging from 30 tons to 2800 tons — including Japan’s Fanuc, Sumitomo, Toshiba, Nissei, Engel, and Germany’s Arburg.
Clamping Force Typical Application
30–180 tons Small‑to‑medium preform molds (up to 32 cavities)
200–350 tons 48–72 cavity PET preform molds
450–800 tons High‑cavity (96–144) preform production
1200–2800 tons Ultra‑high cavity counts or large industrial parts
Each machine features servo‑drive technology with ±0.1% repeatability, ensuring that every shot from every cavity matches the master sample.
4.3 Quality Inspection Equipment
CMM (Zeiss / Mitutoyo): Full mold component verification before assembly
Optical comparator / vision system: Preform thread profile, neck finish geometry, and gate vestige inspection
IV measurement system: Incoming resin and finished preform intrinsic viscosity testing
Acetaldehyde (AA) analyzer: Ensures < 1 ppm AA for taste‑ and odor‑sensitive applications
Part V: Mold Making Competitiveness – Specs That Speak for Themselves
5.1 Mold Life Expectancy
We specify mold life in real terms — not marketing claims:
Mold Component Material Typical Steel Grade Warranted Shot Life
Mold base P20 (pre‑hardened) 500,000+ shots
Core / cavity inserts S136, 2344, H13, NAK80, 8407, SKD11/61, DC53, M340 Glass‑filled materials: 500,000 shots
Unfilled PET: 1,000,000+ shots
Hot runner system (when specified) Hardened stainless steel 1,000,000+ shots
5.2 Achievable Tolerances
Feature Type Achievable Tolerance Customer Value
General structural dimensions ±0.05mm Reliable assembly and blow molding
Thread profile / sealing surfaces ±0.02mm Leak‑proof closure fit
Precision gear or medical component ±0.005mm Zero‑defect functional parts
Preform neck finish (critical) ±0.02mm Consistent capping torque
Every mold is delivered with a full dimensional report and critical feature CPK ≥ 1.33.
5.3 Mold Types and Configurations
Hot runner molds: Gate vestige minimized, material waste < 1%
Cold runner molds: Lower initial investment, suitable for prototyping or lower volume
Stack molds: Doubles output without increasing machine clamp force
Multi‑material / overmolding molds: For specialized barrier or color‑layered preforms
5.4 Delivery Time Standards
Mold Complexity Standard Lead Time Rush Service
Simple family mold (up to 16 cavities) 15–25 days 12–18 days
Medium complexity (32–64 cavities, hot runner) 25–45 days 20–30 days
High‑cavity (72–144 cavities) with precision cooling 45–65 days 35–50 days
Part VI: Injection Molding Process Control – Eliminating Quality Anxiety
6.1 Process Standardization
All 260 injection molding machines are networked to a centralized MES (Manufacturing Execution System). Key molding parameters — melt temperature, injection pressure profile, holding pressure, cooling time, screw speed — are locked to the validated recipe. Only authorized engineers can modify settings after change management approval.
6.2 Dimensional Stability Control
Method: Each mold cavity is fitted with conformal cooling channels and multi‑zone mold temperature controllers. The temperature difference between core and cavity sides is maintained within 2°C, eliminating warpage and non‑uniform shrinkage.
Proof: In a 96‑cavity 84mm preform mold, continuous weekly production across three batches showed critical neck finish roundness variation ≤ 0.02mm, ensuring every preform seats perfectly in the blow molding machine.
6.3 Appearance Quality Grades
Grade Specification Inspection Method
Premium optical / transparent No bubbles, no flow marks, no splay 100% vision inspection
Standard food grade Minimal gate vestige, uniform color Random sampling + AQL
Cosmetic / high‑gloss surfaces Ra surface roughness ≤ 0.2 μm Profilometer verification
6.4 Special Material Capabilities
Ansix Tech has molded over 200 resin types across 28 years, including:
Standard engineering resins: PC/ABS, PC, PA6+GF30, PBT, PEI, PPS, LCP
High‑temperature materials: PEEK (up to 400°C melt), PPS+40%GF, PEI (Ultem)
LSR (liquid silicone rubber): Arburg LSR machines with precision metering
Flame‑retardant grades: UL94 V‑0 certified for electronics and automotive
FDA and medical grades: USP Class VI, ISO 13485‑certified cleanroom molding
Part VII: Full‑Service Lifecycle – Reducing Your Management Overhead
7.1 DFM Report (Design for Manufacturing) – Before You Invest
Many suppliers open the mold before verifying design feasibility. Ansix Tech does the opposite.
We provide a comprehensive DFM report before mold construction, including:
DFM Component What We Deliver
Parting line location Optimized for flash‑free molding
Draft angle recommendations 0.5°–3° based on material and texture
Wall thickness analysis Balanced flow, minimized sink marks
Gate location and type Hot tip, valve gate, edge gate, or submarine gate
Weld line and gas trap prediction Moldflow simulation to reposition gates or add venting
Ejector pin mark locations and witness marks Agreed location and acceptable depth range
7.2 Sampling and Validation (T0 to Tn)
Stage Deliverable
T1 – First shot Dimensional measurement report + visual inspection
T2 – Optimization Report on adjustments made (temperature, pressure, venting)
T3 – Pre‑production CPK analysis (target ≥ 1.33 for critical dimensions)
PPAP / qualification (if required) Full documentation package per customer requirement
7.3 Low‑Volume Pilot Run
Before full mass production, Ansix Tech offers a 100–500 shot pilot run using your specified resin, drying conditions, and machine platform. We provide:
Yield report (reject rate per defect category)
Process capability study (CP and CPK per dimension)
Cycle time verification
Color / appearance consistency across multiple shots
Only when you approve the pilot results do we proceed to commercial production.
7.4 Maintenance and Spare Parts
We do not just deliver a mold — we deliver ongoing support:
Spare parts kit included with every mold: spare ejector pins, core pins, and hot runner components
Preventive maintenance schedule provided: recommended inspections at 50k, 100k, 200k, 500k cycles
Lifelong repair service at cost + 15% labor (not the industry’s typical 2x markup)
Emergency mold repair: 24‑hour turnaround for most mold‑in‑plant issues
Part VIII: Differentiated Competitive Advantages – Direct Answers to Your Pain Points
8.1 “Our molds need frequent repair — production stops, orders delay.”
Ansix Tech solution: Every mold undergoes 2,000‑shot accelerated wear testing before leaving our facility. We simulate worst‑case injection conditions and measure wear at the parting line, thread inserts, and ejection system. We provide a wear report showing post‑test condition and expected remaining life.
Warranty commitment: Three‑year structural warranty on mold base and plates (excluding normal‑wear consumables such as ejector pins and hot runner tips).
8.2 “Flash is everywhere — we spend 20% of our labor on deflashing.”
Ansix Tech solution: We machine parting lines to 0.005mm fit accuracy using CNC surface grinding and high‑precision EDM. We design self‑locking mold geometry where the clamp force naturally seals the parting line. The result: flash height ≤ 0.03mm, which typically falls off during automatic part extraction.
Cost impact: For a 96‑cavity mold running 1 million shots per year, eliminating manual deflashing saves approximately $10,000–25,000 in annual labor, plus eliminates the risk of part damage during deflashing.
8.3 “Dimensions change from one batch to the next — blow molding rejects are high.”
Ansix Tech solution: Real‑time closed‑loop process control:
Ultrasonic wall thickness sensors mounted on the mold — measure preform wall thickness after every shot and automatically compensate injection pressure
Mold‑mounted temperature and pressure sensors — detect thermal imbalance between cavities and adjust hot runner zone independently
Plastic melt pressure monitoring at nozzle and each hot runner drop — ensures uniform filling regardless of resin viscosity variations
8.4 “Mold repair takes weeks; our production stops completely.”
Ansix Tech solution: We maintain in‑house electrode manufacturing and EDM facilities — 95% of mold repairs are performed without subcontracting. Standard repair timeline:
Repair Type Typical Turnaround
Ejector pin replacement 2–4 hours
Parting line touch‑up (welding + grinding) 8–16 hours
Cavity insert replacement 24–48 hours
Complete core/cavity re‑cut (full set) 3–5 days
Part IX: Cost Reduction Strategy – How Ansix Tech Lowers Your Total Cost
9.1 Resin Cost Optimization
PET resin is the largest cost driver (typically 62–85% of ex‑works preform cost). Ansix Tech leverages:
Strategy Typical Savings
Bulk resin purchasing (customer‑owned consigned material) Avoids markup; cost passed through at cost
Lightweighting through mold flow simulation Reduces base weight 3–8% without compromising structural integrity
Scrap reduction via OEE > 95% Process loss reduced from typical 3–5% to < 1.5%
rPET blending support (up to 100%) Lower material cost when using post‑consumer recycled PET
9.2 Cycle Time Reduction
Shorter cycle = more parts per hour = lower per‑unit fixed cost.
Our methods:
Optimized conformal cooling channels (maintains uniform 7–12°C water temperature)
Automated part removal (robotic take‑out reduces mold open time by up to 40%)
Mold surface coatings (DLC or nitriding) to improve demolding without increasing cooling time
Example: For a 96‑cavity 84mm/50g preform mold, reducing cycle time from 11 seconds to 9 seconds increases daily output by 27,000 preforms — saving approximately $0.002–0.005 per part in fixed cost amortization.
9.3 Energy Efficiency
Servo‑drive injection molding machines consume 30–50% less energy than standard hydraulic machines. For an 8‑machine PET preform production cell, annual energy savings exceed $50,000.
9.4 Logistics and Packaging Optimization
Preforms are denser than finished bottles — we optimize palletization to maximize container cube utilization
Custom corrugated packaging designed to prevent scratches and dust contamination
In‑house vacuum bagging or shrink‑wrapping for moisture‑sensitive PET prior to blow molding
Part X: Quality Assurance and Supply Chain Reliability
10.1 Quality Management System
Ansix Tech maintains multiple ISO certifications:
ISO 9001:2015 – Quality management
ISO 13485:2016 – Medical device manufacturing (cleanroom molding)
IATF 16949:2016 – Automotive quality standard (for automotive packaging applications)
ISO 14001 – Environmental management
BSCI – Social compliance
Cleanroom capability: ISO 8 (Class 100,000) cleanroom for food‑contact and medical preform production.
10.2 Inspection and Testing Plan
Stage Inspection Items Frequency / Method
Incoming raw material IV, moisture content, color Every batch
In‑process Shot weight, cavity‑to‑cavity balance Continuous monitoring (MES)
Preform dimensional Neck finish OD/ID, length, thread profile Random sample every 30 minutes (CMM)
Preform appearance Flash, gate vestige, splay, bubbles 100% automated vision inspection
Mechanical / functional Drop test, top load, blow stretch ratio Per ASTM / customer requirement
10.3 Traceability
Hot runner zone temperature data logged per cavity per shot
Resin batch numbers tied to production run
Mold cavity serialization – defective cavities identified and tracked
Full PPAP documentation available for automotive or medical customers
Part XI: Delivery and Lead Times – Predictability You Can Plan Around
11.1 Standard Lead Time (Mold + Preform Production)
Quantity Typical Lead Time
Mold manufacturing (64–96 cavities) 30–45 days
Pilot run (first samples) +5–7 days after mold completion
PPAP / qualification +7–10 days
Mass production (first full container shipment) 10–15 days after PPAP approval
11.2 Volume Capabilities
Annual preform production capacity: >500 million units across all neck sizes
Maximum daily output per 96‑cavity mold: 50,000–70,000 preforms (depending on cycle time)
Maximum cavity count per mold: 144 cavities (with appropriate machine clamp force, 500–800 tons)
11.3 Rush Service
Service Level Surcharge Additional Resource Commitment
5‑day mold repair (emergency) 30–50% Dedicates a 5‑axis CNC and EDM station 24 hours
15‑day mold from design approval 40–60% Double‑shift toolroom + expedited heat treating
7‑day preform sample from resin receipt 20–30% Dedicated molding cell reserved for your project
Part XII: Why Choose Ansix Tech – Final Value Proposition
12.1 Proven Track Record
Founded 1998 in Hong Kong; 28+ years of continuous injection molding and tooling experience
Four production bases in China and Vietnam
260 injection molding machines (30–2800 tons)
1200+ employees, including dedicated engineers, toolmakers, quality control, and logistics team
Annual turnover: Exceeding 1 billion RMB
Global customer base: USA, Canada, Germany, France, UK, Italy, Spain, Japan, Korea, Australia, and Southeast Asia
12.2 One‑Stop Solution
You do not need to source mold making and molding separately. Ansix Tech provides:
Service Delivered In‑House
Mold design (DFM, Moldflow) ✓
Mold manufacturing (CNC, EDM, wire EDM, grinding) ✓
Heat treatment and surface coating ✓
Preform production (injection molding) ✓
Secondary operations (annealing, crystallization of neck finish) ✓
Packaging and logistics ✓
12.3 Sustainability and Compliance
100% rPET capability – we can run post‑consumer recycled PET up to full bottle grade
Lightweighting engineering – reduce per‑preform weight without sacrificing top load or burst strength
Recyclable packaging – use only recyclable corrugated and film
ISO 14001 environmental management covering waste, emissions, and energy
12.4 Customer Success Commitment
“At Ansix Tech, a mold is not a piece of steel — it is your profit engine. We design molds with planned robustness, optimized cooling, and predictable wear patterns. When you receive a mold from us, you receive a production asset that requires minimal commissioning, runs with low scrap, and achieves the shot life we promise.
We invite you to walk through a DFM report with us on an existing product — you will see how we predict and eliminate weld lines, gas traps, and sink marks before the first gram of steel is cut. That is not just cost saving; that is risk elimination.”
Appendix: Key Specifications Summary Table (84mm Neck PET Preform)
Parameter Specification
Neck diameter 84mm (nominal)
Thread type Spiral continuous thread
Preform weights (standard) 30g, 35g, 38g, 50g, 55g, 60g, 68g, 75g, 85g, 90g, 100g
Material Food‑grade PET resin (0.80–0.85 IV)
Color Natural (clear) or custom color masterbatch
Compliance FDA 21 CFR 177.1630, EU 1935/2004, China GB 4806
Mold cavity counts 16, 32, 48, 64, 72, 96, 144
Mold steel (core/cavity) S136, 2344, H13, NAK80, 8407, M340, 4Cr13, 9Cr18
Mold steel (base) P20 (1.2311)
Mold life (unfilled PET) 1,000,000+ shots
Mold life (glass‑filled) 500,000+ shots
Tolerances (general) ±0.05mm
Tolerances (critical) ±0.01–0.02mm
Flash height (max) 0.03mm
CPK (critical dimensions) ≥ 1.33
Cycle time (96‑cavity, 50g preform) 8–12 seconds
Scrap rate (steady state) < 1.5%
Packaging Corrugated cartons with moisture‑barrier liner
Ansix Tech — Engineering your production success, one preform at a time.
For technical inquiries, DFM collaboration, or to request a pilot sample kit of 84mm neck PET preforms, please contact our engineering team directly. We welcome the opportunity to demonstrate how 28 years of specialized expertise translates directly into lower cost, lower risk, and higher reliability for your packaging supply chain.
Ansix Tech Co Ltd
If you have any plans related to 84mm Neck PET Preform with Spiral Neck, Food Grade , 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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