4-cavity 5-gallon bottle preform mold
FEATURES
Hardware Foundation — Infrastructure That Builds Customer Trust
Before a single line of steel is cut, our manufacturing infrastructure establishes the foundation for every performance promise we make. We have strategically invested in world‑class equipment that translates directly into superior product quality, faster delivery, and lower lifetime costs for our customers.
Mold Manufacturing Equipment (Putting Precision Into Customer Language)
5‑Axis High‑Speed Machining Centers — We operate 5‑axis simultaneous machining centers capable of achieving 0.002 mm precision on complex curved surfaces. For our customers, this directly translates to flawless parting lines, no visible witness marks on finished bottles, and zero post‑processing deburring costs.
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Mold Description
Product Materials:
PET PETG PS AS PP
Mold Material:
S136ESR
Number of Cavities:
1*4
Glue Feeding Method:
Hot runner
Cooling Method:
Water cooling
Molding Cycle
32.5s
- The mold manufacturing process and product material selection
Slow Wire EDM (Wire‑Cut EDM) — Our slow wire EDM machines cut micro‑holes and narrow slots down to 0.03 mm with exceptional precision. This capability ensures that cooling channels, venting slots, and ejector pin holes are executed to perfection, eliminating thin‑wall deformation risk that plagues preform molds from inferior manufacturers.
CNC EDM with Graphite/Cu‑W Electrodes — Dedicated electrode machining centers ensure that complex cavity geometries—including the critical neck finish area with its sealing surface and thread profiles—are reproduced with mirror‑like surface finishes.
Surface and Cylindrical Grinding — Precision grinding down to 0.002 mm parallelism ensures perfect mating of mold plates, eliminating flash and ensuring uniform wall thickness distribution across all four cavities.
Injection Molding Machine Fleet (The Production Engine)
Our manufacturing capability extends to injection molding machines ranging from 30 tons to 4,000 tons, covering the complete spectrum of 5‑gallon preform production and beyond. For 4‑cavity 5‑gallon preform applications, our recommended machine configuration features:
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Parameter Specification
Clamping Force 3,850 kN – 4,500 kN (385–450 tons)
Injection Weight Capacity 4,000 g+ (sufficient for 4 × 750 g shots)
Screw Design PET‑specific barrier screw with 24:1 L/D ratio
Control System Fully electric servo‑driven with ±0.1% repeat accuracy
Each machine features full servo motor drive systems delivering ±0.1% repeatability, ensuring that every shot across every cavity is identical to the last. For our customers, this means: no unexpected dimensional drift, no mid‑production surprises, and no expensive re‑qualification runs when switching material batches.
Metrology and Inspection Equipment (Turning Data into Confidence)
Our in‑house inspection laboratory is equipped with:
Equipment Capability Customer Value
CMM Coordinate Measuring Machines (Bridge/Gantry) 0.001 mm resolution Full dimensional inspection report before shipment
Optical Digital Comparators 0.0005 mm resolution Rapid cavity and core profile verification
Surface Roughness Testers Ra measurement to 0.01 μm Guaranteed surface finish for clear/transparent bottles
Hardness Testers (Rockwell, Brinell) HRC calibration Verified steel heat treatment compliance
Ultrasonic Wall Thickness Gauge Non‑destructive preform inspection Real‑time QC during trial runs
Our Quality Guarantee: Every mold undergoes 100% dimensional inspection before shipment, with key dimensions documented to CPK ≥ 1.33.
Section II: Mold Manufacturing — Core Competencies Measured in Customer-Friendly Metrics
Our mold manufacturing competencies are best understood not through engineering jargon, but through the metrics that matter most to your business: lifetime production cycles, dimensional stability, and maintenance costs.
Mold Life Expectations (Your Production Runway)
Steel Material Application Guaranteed Mold Life Customer Value
P20 (Pre‑hardened) Mold plates, support structures 500,000 – 1,000,000 shots Baseline durability for standard applications
S136 / 420SS (Stainless) Cores, cavities, neck ring 1,000,000 – 2,000,000 shots Superior corrosion resistance; transparent preform surface quality
2344 / 8407 / H13 (Hot Work) Core pins, hot runner manifolds 500,000 – 1,500,000 shots High‑temperature stability; PET‑specific thermal performance
NAK80 (Pre‑hardened) High‑polish cavities Up to 3,000,000 shots Mirror finish for crystal‑clear bottles
D2 / DC53 / SKD11 (Cold Work) Wear‑prone inserts 2,000,000+ shots Extreme wear resistance for long‑run production
S136 steel offers excellent corrosion resistance and polishability, making it the preferred choice for transparent and food‑contact preforms. 2344 and 8407 steels, both H13‑class hot work tool steels with enhanced purity and uniform microstructure, achieve post‑heat‑treatment hardness of HRC 50–54, delivering superior thermal fatigue resistance and longer service life in high‑temperature PET applications.
For glass‑fiber reinforced PET (typically 30% GF or higher), we guarantee 500,000 shots before requiring major service. For standard virgin PET applications, we guarantee 3,000,000 shots. Every mold includes complete material certification reports and heat treatment temperature curves for full traceability.
Dimensional Tolerances Achievable
Feature Standard Tolerance High‑Precision Capability
Core and cavity dimensions ±0.01 mm ±0.005 mm
Ejector pin locations ±0.02 mm ±0.01 mm
Cooling channel positions ±0.05 mm ±0.02 mm
Concentricity (core to cavity) 0.02 mm 0.01 mm
Preform wall thickness distribution ±0.03 mm ±0.02 mm
For preform dimensions—critical for subsequent blow molding success—we routinely hold concentricity within 0.015 mm, ensuring uniform wall thickness distribution during stretch blow molding.
Mold Types and Configurations
Hot Runner Systems — Eliminates runner waste, reduces cycle time, and delivers material directly into each cavity for balanced filling. For PET preforms, valve‑gate hot runner systems provide clean gate vestige with zero post‑trimming operations.
Cold Runner (3‑plate) — Lower initial investment, suitable for smaller production volumes or material flexibility requirements.
Stack Molds (future expansion) — Doubles output without increasing machine footprint when production volumes escalate.
Gate and Runner Optimization (Mold Flow Analysis Excellence)
Every mold project begins with comprehensive mold flow analysis (CAE simulation using Moldex3D or Autodesk Moldflow) before any steel is cut. Our team:
Simulates the complete melt flow — predicts filling patterns, weld line locations, and air entrapment zones
Optimizes gate location and quantity — ensures balanced filling across all four cavities, eliminating short shots and over‑packing
Validates cooling circuit efficiency — predicts temperature distribution and optimizes cooling channel placement
Predicts warpage and shrinkage — compensates for material‑specific behavior before mold manufacturing
Customer Value: A single DFM analysis identifies potential problems that would otherwise cost weeks of physical tryout time and tens of thousands of dollars in rework.
Standard Lead Times (Your Time‑to‑Market)
Complexity Level Standard Lead Time Rush Service
Simple preform mold (standard neck, established design) 25–30 days 18–22 days
Medium complexity (custom neck, special cooling) 30–45 days 25–30 days
Complex (full DFM, multiple iterations, custom materials) 45–60 days 35–45 days
Rush orders still undergo full DFM analysis and validation—we never compromise quality for speed.
Section III: Injection Molding Process Control — Eliminating Customer Quality Anxiety
For customers producing millions of bottles annually, product quality anxiety centers on three questions: Will my preforms be dimensionally consistent from batch to batch? Will I see defects like sinks, flashes, or white bands? Will I have to scrap entire production runs? Ansix Tech’s process control systems answer every question with data, not promises.
Process Standardization and MES Integration
All production machines are networked to a centralized MES (Manufacturing Execution System). Every molding parameter—temperature profile, injection speed profile, holding pressure, cooling time, and screw position—is locked into the system. Only authorized engineering personnel can make adjustments, and all changes are logged with date, time, and operator ID.
Customer Value: No unauthorized modifications, no undocumented process drift, and full batch traceability. Every shot is produced under identical conditions to the first validated sample.
Dimensional Stability Control Systems
Control Mechanism Technical Execution Customer Benefit
Mold temperature zone control Each cavity zone independently controlled (±1 °C) No core‑cavity temperature mismatch → Reduced warpage
Ultrasonic wall thickness sensors Real‑time preform thickness monitoring during injection Automatic compensation for material viscosity variation
In‑mold pressure/temperature sensors Closed‑loop cavity pressure feedback system Cycle‑by‑cycle consistency, not just statistical sampling
Post‑mold cooling station Secondary cooling after ejection Faster cycle times without quality compromise
We maintain core‑to‑cavity temperature differential within 2 °C—the industry benchmark for minimizing preform warpage and internal stress. In a recent automotive interior panel project, we demonstrated consistent dimensional stability with critical hole‑to‑hole spacing variation below 0.02 mm across three consecutive production weeks.
Surface Finish and Appearance Quality Standards
Requirement Ansix Tech Capability Industry Benchmark
General preform SPI A‑1 (Mirror) / SPI B‑1 (High gloss) Ra ≤ 0.025 μm
Transparent preform (bottle grade) SPI A‑1 with diamond polish No haze, no flow marks
Thread areas SPI B‑2 (semi‑gloss) Consistent torque performance
Gate vestige ≤ 0.3 mm protrusion No trimming required
Our mirror‑polished cavities (Ra ≤ 0.025 μm) guarantee crystal‑clear preforms with no surface defects that would become visible after blow molding.
Special Material Processing Capabilities
Beyond standard PET, Ansix Tech has extensive production experience across a wide spectrum of engineering thermoplastics. Below is a summary of our key material processing capabilities and the unique requirements for each:
PET (Virgin & rPET) — requires thorough pre‑drying to 50 ppm moisture to prevent hydrolysis degradation. Injection temperatures: 260–290 °C. Our PET‑optimized screw design ensures uniform plasticization with minimal acetaldehyde generation. Up to 100% rPET content processed successfully.
PC (Polycarbonate) — requires high melt temperature (280–310 °C) and strict moisture control. Excellent clarity and impact strength. Used for reusable 5‑gallon bottles and premium applications.
PC/ABS Blends — combines PC′s toughness with ABS′s processability. Melt temperature: 260–280 °C. Requires balanced cooling to prevent residual stress. Used for bottle caps and accessories where chemical resistance and impact strength are critical.
PEEK & PEI (Ultem®) — high‑temperature engineering plastics with continuous use temperatures up to 250 °C (PEEK). Requires 340–400 °C melt temperature and specialized corrosion‑resistant mold steels. Used for industrial and medical containers requiring extreme durability.
PP (Polypropylene) & HDPE — semi‑crystalline polymers with lower processing temperatures (200–250 °C). Good chemical resistance and lower cost. Suitable for non‑transparent container preforms.
PA6+GF30 (Nylon with 30% glass fiber) — requires high injection pressure (up to 2,000 bar) and wear‑resistant mold components. Our D2/DC53 wear inserts withstand the abrasive glass fiber content, extending mold life significantly.
PPS (Polyphenylene Sulfide) — high‑temperature, high‑chemical‑resistance polymer for industrial and food equipment applications. Requires 300–340 °C melt temperature and specialized venting to prevent gas entrapment.
LCP (Liquid Crystal Polymer) — exceptionally low viscosity but requires precise wall thickness design (≤ 1 mm recommended) and flow length management (≤ 150 mm). Used for ultra‑thin‑wall preforms and precision components.
LSR (Liquid Silicone Rubber) — two‑component thermoset material requiring cold runner systems and precision metering. Used for soft‑touch components and sealing applications.
Property Ansix Tech Verification
UL94 flammability rating V‑0 certified for applicable materials
UV resistance 3,000‑hour accelerated weathering testing
FDA food contact compliance Full material certification documentation
EU 10/2011 migration testing Available upon request
REACH / RoHS compliance Standard certification included
Section IV: Full‑Process Service — Reducing Customer Management Cost
Most mold manufacturers deliver only the tool. Ansix Tech delivers a complete production ecosystem—reducing your management overhead, eliminating cross‑vendor coordination, and accelerating your path to commercial production.
Early Stage Engineering (DFM Report — Before Commitment)
Before any deposit payment, we provide a comprehensive DFM (Design for Manufacturability) analysis report that includes:
DFM Component What We Analyze How It Protects Your Investment
Draft angle verification Minimum 1° – 3° (preform specific) Ensures clean part ejection
Wall thickness uniformity Recommended 2.5–3.5 mm for PET Prevents sinks and voids
Gate location optimization Through CAE simulation Eliminates visible gate marks
Ejector pin mark placement Designated locations only No marks on critical sealing surfaces
Cooling circuit validation CFD thermal analysis Predicts 40–60% cycle time reduction
Material shrinkage compensation Pre‑compensated CAD model First‑shot parts meet specification
Customer Value: Up to 70% of total part cost is locked in during design. By catching issues at the DFM stage, we prevent expensive tooling modifications and production delays.
Trial Runs and Sample Approval (T0 Through T3)
We conduct four structured trial stages before production release:
Trial Focus Deliverable
T1 First sample shots Dimensional verification report
T2 Process window mapping Optimal parameters documented
T3 Validation runs (8‑hour continuous) CPK analysis, defect rate
Production release Customer‑approved run Full PPAP package
Between each trial, we provide detailed improvement reports documenting every adjustment and its impact on quality metrics.
Pilot Production Validation (De‑risking Mass Production)
Before committing to full commercial production, we offer a 100–500 shot pilot validation run:
Manufactured on your designated production machine (or representative equivalent)
Statistical analysis of batch consistency — CPK for all critical dimensions
Blow molding test of random samples to verify final bottle quality
Full defect categorization — documented with corrective recommendations
Customer Value: You confirm production stability before committing to large‑scale procurement, eliminating the risk of discovering quality issues after full production begins.
Maintenance, Spare Parts, and Lifetime Support
Service Details
Initial spare parts kit Ejector pins (complete set), core pins (2 per cavity), hot runner nozzles + tip set, springs and fasteners
Preventive maintenance schedule Provided at delivery: lubrication points, cleaning intervals, recommended inspections
Mold refurbishment Every 500,000 shots or as needed — wear part replacement, surface re‑polishing
Emergency repair 24‑hour response for critical production downtime
Lifetime repair pricing Cost‑only (no margin) for molds manufactured by Ansix Tech
Section V: Differentiated Commitment — Turning Common Industry Pain Points into Solutions
The injection molding industry has persistent, predictable customer frustrations. Ansix Tech addresses each directly, with verifiable commitments rather than generic promises.
Common Customer Complaint Ansix Tech’s Response (Backed by Real Capability)
“Mold requires constant repair — disrupts production schedules” We pre‑test to 2,000 shots before delivery — complete wear report included. We also offer a three‑year structural warranty (excluding normal wear components).
“Excessive flashing — high post‑processing labor costs” We maintain 0.005 mm parting line precision and employ self‑locking clamp force compensation. Guaranteed flash ≤ 0.03 mm — eliminates manual deflashing.
“Dimensions change from batch to batch — inconsistent blow molding” In‑mold temperature sensors and ultrasonic wall thickness monitors provide real‑time closed‑loop control. No drift between batches.
“Long repair lead times — production stops for weeks” In‑house electrode manufacturing and EDM capability. Mold modifications: 24 hours for minor inserts/weld repairs. Major refurbishment: 7–10 days.
“Gate vestige requires secondary trimming — adds cost and scrap” Valve‑gate hot runner system with zero gate vestige. No post‑mold finishing required for preforms.
“Mold delivered without training — integration takes weeks” Full integration support including on‑site commissioning (travel/expenses extra, but technical support included).
Section VI: Cost Advantage — Systematic Reduction from Multiple Dimensions
At Ansix Tech, we engineer cost out of your product systematically, not by compromising on quality. Our cost optimization framework operates across four dimensions: Material, Process, Efficiency, and Lifecycle.
1. Material Cost Optimization (Lowering Your Raw Material Spend)
Approach Implementation Customer Savings
Wall thickness optimization Through DFM and FEA analysis, we identify and eliminate unnecessary material 5–15% preform weight reduction without compromising structural integrity
Gate location optimization Balanced filling reduces localized over‑packing and material waste Minimizes recycled material generation
Material selection guidance We recommend cost‑effective alternatives without over‑specifying Up to 20% lower material cost per part
Minimized sprue/runner waste Hot runner systems eliminate cold runner waste entirely 10–25% material saving vs. cold runner molds
For a 5‑gallon preform weighing 700 g, every 1% weight reduction across 1 million preforms saves 7 metric tons of PET resin annually — representing significant cost savings and a meaningful sustainability contribution.
2. Process Efficiency Optimization (Reducing Your Per‑Part Production Cost)
Efficiency Driver Implementation Cycle Impact
Conformal cooling channels 3D‑printed or precision‑machined cooling follows part contour 15–30% cycle time reduction
Post‑mold cooling station Secondary cooling outside the mold 20–40% reduction in mold residence time
Optimized injection profile Multi‑stage injection + holding pressure optimization 10–15% faster fill/cool balance
Hot runner temperature zoning Individual zone control for each cavity Reduced shear heating → faster cooling
Quick mold change system Standardized clamping interface < 10 minutes mold changeover
A typical 4‑cavity 5‑gallon preform mold running a 120 second cycle can achieve a reduced cycle of 85–95 seconds after our optimization process — a direct 25–35% increase in daily production output without additional capital investment.
3. Quality Cost Reduction (Lowering Your Scrap and Rework)
Quality Cost Typical Industry Ansix Tech Target
First‑article inspection failure rate 10–20% < 5% (through DFM and simulation)
Production scrap rate (stable production) 2–5% < 0.5%
Blow molding defect rate (downstream) 1–3% < 0.5%
Unplanned maintenance downtime 5–10% of production time < 2% (through preventive scheduling)
For a customer producing 5,000 preforms per day, reducing scrap from 3% to 0.5% saves 125 preforms per day — or approximately 45,000 preforms per year — worth thousands of dollars in recovered material and avoided production time.
4. Lifecycle Cost Optimization (Your Total Cost of Ownership)
Cost Factor Industry Baseline Ansix Tech Advantage
Mold purchase price Benchmark only 10–20% lower through value engineering
Tooling maintenance per 1M shots
3
,
000
–
3,000–8,000
1
,
500
–
1,500–3,000 (through wear‑resistant materials + spare kit)
Production downtime due to mold issues 50–100 hours/year 10–20 hours/year
Mold lifetime 1M–2M shots 3M shots (standard materials)
Case Example: Cost Impact of Optimized Cooling System Design
Cooling time typically constitutes up to 80% of the total molding cycle for PET preforms. Our conformal cooling design using Moldflow simulation achieves:
Comparison Standard Cooling Conformal Cooling (Ansix) Benefit
Cycle time (4‑cavity) 120 sec 95 sec 21% faster → +21% daily output
Temperature uniformity ±8 °C across cavities ±2 °C across cavities Consistent quality, reduced warpage
Cooling channel accessibility Limited Optimized for maintenance Faster cleaning, less downtime
Annual output (2 shifts, 250 days) 600,000 preforms 760,000 preforms +160,000 preforms without additional machine investment
The incremental output of 160,000 preforms per year represents revenue opportunity without purchasing additional injection molding machines — a compelling ROI justification for the initial mold investment.
Section VII: Quality Assurance — Full Verification Before Delivery
Our quality system is built on documented evidence, not marketing claims.
Pre‑Delivery Verification Protocol
Verification Stage Activities Deliverable
In‑process inspection CMM checks at each machining stage Stage‑by‑stage inspection log
Assembly verification All components assembled, movements checked Assembly video/photos
Mold trial (At Ansix) 1,000 continuous shots on representative machine Sample preforms (100 pcs), cycle time validation
Blow molding validation Random samples blown into finished bottles Bottle samples, wall thickness distribution report
Full inspection report All critical dimensions measured and documented Full CMM report with CPK analysis
Shipment inspection Final cleaning, rust protection, packaging Shipment clearance certificate
Industry Standards We Comply With
ISO 9001:2015 — Quality management system
ISO 22000 / HACCP — Food safety management (for food‑contact applications)
FDA / EU 10/2011 — Food contact material compliance
GB/T 41102‑2021 — General technical requirements for PET preform injection molding systems
BB/T 0060‑2025 — PET preform product standard for food packaging
Section VIII: Delivery and Packaging — Protection Across Oceans
For international shipments, our packaging protocol is designed for transit protection and rapid deployment at your facility:
Packaging Component Specification
Rust protection Anti‑rust oil applied to all steel surfaces
Internal packaging Waterproof plastic film + moisture‑absorbing desiccant
Internal cushioning Plastic foam bag / stretch film wrap
External packaging Standard export wooden box (ISPM‑15 certified)
Documentation Packing list, mold manual, spare parts list, inspection reports
We offer shipping via DHL, UPS, FedEx, TNT, and LCL/FCL sea freight based on your timeline and budget.
Conclusion: Mold as Value Engine, Not Cost Center
We view every 4‑cavity 5‑gallon bottle preform mold as the customer’s primary value engine — directly driving their production capacity, product quality, and profitability.
Our Capabilities Solve:
Eliminate production disruptions — 3‑year structural warranty, 2,000‑shot pre‑test, and wear‑resistant materials
Reduce quality scrap — CPK ≥ 1.33, ±0.02 mm dimensional stability, real‑time closed‑loop process control
Lower per‑part costs — Cycle time optimized, conformal cooling, minimized runner waste, weight‑optimized design
Decrease total cost of ownership — Extended mold life, lower maintenance intervals, cost‑plus repair pricing
Our Experience Speaks Through:
28+ years of precision mold manufacturing
Strategic partnerships including BMW and Tesla
Global customer base across North America, South America, Europe, Asia, and Africa
We invite you to experience our DFM process firsthand. Provide one of your product drawings or an existing problem project, and we will conduct a complete DFM analysis demonstrating exactly how we would solve your specific concerns — weld line management, trapped gas elimination, sink mark prevention, or any other injection molding challenge — before any steel is cut.
At Ansix Tech, we don′t just build molds. We engineer your competitive advantage, one precision tool at a time.
Contact Ansix Tech:
Email: info@ansixtech.com
Website: www.ansixtech.com
Headquarters: Shenzhen, China
Every mold is unique. Please contact us with your specific part geometry, production volume targets, and material requirements for a customized manufacturing solution and quotation.
Ansix Tech Co Ltd
If you have any plans related to 4-cavity 5-gallon bottle 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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