20-thread thread, 6.5g, 9g, 11g, 13g, 15g, long and short preforms, PET bottle preforms, cosmetic preforms
FEATURES
Hard Infrastructure — The Foundation of Customer Confidence
At Ansix Tech, we believe that world-class products require world-class equipment. Our manufacturing infrastructure is designed to deliver precision, consistency, and reliability at scale.
Advanced Mold Manufacturing Equipment
Our mold manufacturing capabilities are anchored by state-of-the-art machinery that ensures every mold meets the most demanding specifications:
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Mold Description
Product Materials:
PET PETG
Mold Material:
S136ESR
Number of Cavities:
16
Glue Feeding Method:
Hot runner
Cooling Method:
Water cooling
Molding Cycle
16.5s
- The mold manufacturing process and product material selection
Five-Axis High-Speed Machining Centers: Our five-axis machining centers achieve positioning accuracy of 0.002mm. This enables us to machine complex curved surfaces with exceptional precision, ensuring your preform’s critical features — including thread profiles, sealing surfaces, and parting lines — are smooth, free of burrs, and dimensionally perfect. The value to you: elimination of secondary finishing operations, reduced labor costs, and consistent first-run quality.
Wire EDM (Electrical Discharge Machining): Our slow-speed wire EDM systems can produce micro-features as small as 0.03mm, including narrow slots, complex contours, and fine cooling channels. This capability is particularly critical for producing high-cavitation preform molds where tight spacing between cavities demands precision machining. The value to you: thinner wall sections, lighter preforms, and the ability to produce complex neck geometries that differentiate your products in the market.
CNC Precision Grinding and Machining Centers: Complementing our machining and EDM capabilities, our precision grinding equipment ensures that mold components achieve the exact surface finish and dimensional accuracy required for high-volume production.
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Injection Molding Machine Fleet
Ansix Tech operates 260 injection molding machines across our four production bases in China and Vietnam. Our machines range from 30 tons to 2,800 tons of clamping force, providing the flexibility to produce everything from small cosmetic preforms to large-format PET preforms.
Our fleet includes premium machines from Japan‘s Fanuc, Sumitomo, Toshiba, and Nissei; Austria’s Engel and Germany‘s Arburg (specializing in liquid silicone and two-component molding); as well as China’s Haitian and Victor Taichung Machinery.
All-Servo Electric Drives: Our machines feature all-servo electric drive systems that deliver repeatable positioning accuracy of ±0.1%. This means that from the first shot to the millionth shot, every preform you receive will be virtually identical. The value to you: predictable downstream blow molding performance, reduced scrap rates, and the confidence that every batch meets your specifications.
Hot Runner Systems and Dedicated Preform Molds: Our PET preforms are typically formed using hot runner molds. Our machines incorporate PET-specific plasticizing units that achieve high-speed, high-quality melting under low-shear conditions, ensuring product transparency and quality, with dedicated integrated cooling water systems enabling stable cycle times as short as 10 seconds.
Quality Inspection and Metrology Equipment
Quality is not an afterthought at Ansix Tech — it is embedded in every stage of production:
Coordinate Measuring Machines (CMM): Our CMM equipment enables full dimensional inspection of every mold cavity and critical preform dimension. Each mold undergoes a complete dimensional report before shipment.
Optical Inspection and Vision Systems: Our automated optical inspection systems perform high-speed dimensional and visual checks on preforms, detecting defects including bubbles, black specs, scratches, and dimensional deviations before products leave our facility.
Quality Certifications: We maintain ISO9001, IATF16949 (automotive), ISO13485 (medical devices), ISO14001 (environmental), and BSCI certifications. For our preform production, every critical dimension is verified with CPK ≥ 1.33 — ensuring your production line runs without interruptions caused by out-of-spec components. The value to you: zero-defect delivery, documented traceability, and qualification for the most demanding industries.
Factory Footprint and Scale: Across more than 200,000 square meters of manufacturing space with over 1,200 employees — including more than 200 design engineers — we have the capacity to deliver large-volume orders on time while maintaining rigorous quality standards.
Section Two: Mold Manufacturing — Core Competitiveness and Customer Value
For preform manufacturers, the mold is not a piece of steel — it is a printing press that generates value with every cycle. At Ansix Tech, we design and build molds that maximize your return on investment.
Mold Materials and Steel Selection
The material composition of your mold directly impacts its longevity, part quality, and maintenance costs. At Ansix Tech, we select mold materials based on a rigorous analysis of your production requirements:
Mold Base Materials: We typically specify P20 steel for mold bases due to its excellent machinability and toughness. P20 provides the structural integrity needed for high-cavitation preform molds operating under repeated high clamping forces.
Cavity and Core Materials: Our mold cores and cavities are manufactured from premium tool steels selected for wear resistance, polishability, and thermal conductivity:
Steel Grade Key Properties Best Application Customer Value
S136 / 4Cr13 High corrosion resistance, mirror finish capability, excellent polishability Clear and cosmetic preforms requiring optical transparency, high-visibility applications Eliminates corrosion-related downtime; maintains part clarity through millions of cycles
2343 / 2344 / H13 High hot hardness, thermal fatigue resistance, excellent toughness High-cavitation preform molds, high-temperature processes Extends mold life under demanding production conditions; reduces replacement frequency
SKD11 / SKD61 / DC53 Superior wear resistance, high compressive strength High-volume preform applications with abrasive materials Minimizes dimensional drift over production life; maintains thread and sealing surface integrity
NAK80 Excellent polishability, uniform hardness, good machinability Prototype and short-run molds, cosmetic preforms requiring exceptional surface finish Faster mold delivery for market testing; reduces upfront investment risk
M340 Advanced corrosion resistance for aggressive environments Cosmetic and healthcare preform molds exposed to harsh cleaning cycles Ensures mold integrity in sterile/cleanroom environments; protects your investment
8407 Premium hot work steel with excellent thermal conductivity High-speed, high-cavitation preform production Reduces cooling time; increases production throughput
Performance Guarantees: We provide documented material certifications and heat treatment curves for every mold component. Our molds deliver 500,000 cycles for glass-filled materials and over 1,000,000 cycles for standard plastics. The value to you: predictable tooling life, the ability to amortize mold costs over longer production runs, and reduced capital expenditure for replacement tooling.
Precision Tolerances and Dimensional Control
Achievable Tolerances: Our molds deliver ±0.05mm for standard structural features and ±0.005mm for critical geometries including thread profiles, sealing lands, and tamper-evident bands. For 20-thread preforms where the nominal crest diameter is 20mm, maintaining neck finish critical dimensions — thread OD/ID, tamper band, and sealing land — is essential for preventing cap leakage and ensuring proper closure application.
We monitor neck finish dimensions with a focus on CPK, ensuring small dimensional drifts are detected and corrected before they can affect your downstream operations. The value to you: zero cap rejection due to thread mismatch, consistent closure torque, and elimination of leak failures.
Mold Design Configurations
Hot Runner Systems: Our molds utilize advanced hot runner systems that maintain PET melt temperature throughout the runner network, preventing material waste and improving flow consistency. Using tools like Moldflow software, we simulate the filling process to optimize runner dimensions and ensure balanced flow across all cavities — we have successfully applied this approach for molds with 96 cavities and more. The value to you: 15–25% material savings from reduced runner scrap, faster cycle times due to optimized melt delivery, and consistent preform weight cavity-to-cavity.
Stack Molds: For high-volume applications, we offer stack mold configurations that double productivity without doubling machine size — delivering double the output per machine hour while reducing your per-part overhead costs.
High-Gloss Molds: For cosmetic preforms requiring exceptional clarity, our high-gloss molds achieve surface roughness Ra < 0.05μm. The value to you: bottle-grade optical clarity without secondary polishing operations, premium product aesthetics that command higher prices.
Multi-Cavity Configurations: Our mold designs can accommodate from 48 cavities to 144 cavities and more on appropriate machine platforms. With higher cavity counts, you produce more preforms per machine hour — reducing labor, utility, and floor space costs per part.
Gate and Runner System Optimization
Mold Flow Analysis (DFM): Before cutting any steel, our engineering team conducts comprehensive mold flow analysis using CAE software. This predictive tool enables us to:
Identify and optimize gate locations before manufacturing begins
Predict weld line and air trap locations and adjust accordingly
Optimize runner dimensions for balanced filling across all cavities
Simulate cooling patterns to prevent crystallization and hotspots
This virtual validation process — drawing on approaches similar to standard industry practice — ensures that your mold arrives ready for production without surprises. The value to you: elimination of the T0 (first trial) surprises that delay production, reduced mold iteration cycles, and faster time to market.
Gate Design: Our gate designs are optimized for PET‘s unique properties — injection speed must be fast enough to prevent premature solidification, while avoiding excessive shear rates that make the material brittle. Our gates balance these requirements to deliver defect-free preforms shot within four seconds.
Cooling System Design for High-Volume Production
Cooling typically accounts for up to 80% of the PET preform molding cycle and ranges from 20 to 30 seconds. Optimized cooling is the single most important factor in achieving high productivity. Our cooling systems feature:
Zoned Mold Temperature Control: Independent temperature control zones maintain core and cavity temperatures within 2°C of each other. This precision prevents warpage, reduces crystallinity (which causes hazy or opaque preforms), and maintains material clarity.
Conformal Cooling Channels: Using advanced machining techniques, we create cooling channels that follow the contour of the preform shape, extracting heat uniformly from thick sections. For PET preforms, mold temperatures should be low and uniform, with fast cooling speed producing more transparent products.
Post-Mold Cooling Integration: For high-cavitation molds, we incorporate post-mold cooling positions that continue cooling the preform after ejection, enabling shorter in-mold cooling times and faster overall cycles.
Cooling Water Systems: Our cooling water is maintained at 7–10°C (40–50°F) with flow rates matching mold manufacturer specifications, ensuring optimal cooling efficiency.
Ejection System Design
Preform ejection is a critical operation where defects such as stretched necks, out-of-round finishes, and surface marks commonly occur. Our ejection systems incorporate:
Proper Draft Angles: 1°–2° drafts on internal and external surfaces ensure clean release without deforming thread flanks
Optimized Ejector Pin Placement: Ejector pins are positioned to distribute ejection forces uniformly, avoiding localized stress concentrations
Controlled Cooling Before Ejection: Sufficient in-mold cooling time (typically 1–3 seconds depending on preform wall thickness) ensures the preform has shrunk sufficiently for clean release
Mold Delivery Standards
Our standard mold delivery timelines are:
Simple molds: 10 days
Medium-complexity molds (e.g., 48-72 cavity preform molds): 25–45 days
Complex molds (96+ cavities, stack molds): 60–90 days
We offer expedited service with compressed lead times, provided the validation phases are not compromised. The value to you: predictable project timelines, the ability to meet market windows, and reduced inventory carrying costs.
Section Three: Injection Molding Process Control — Eliminating Quality Anxiety
Customers worry about defects — sinks, flash, inconsistent dimensions, and batch-to-batch color variation. At Ansix Tech, our process control systems eliminate these worries.
Process Standardization and Digital Connectivity
MES Integration: All our injection molding machines are connected to our Manufacturing Execution System (MES). Critical process parameters — including temperatures, pressures, injection speeds, holding pressures, cooling times, and cycle times — are locked into the MES and can only be modified by authorized engineers. Each batch undergoes first-piece and last-piece verification to documented standards.
PET-Specific Process Optimization: PET injection molding differs from standard processes — preform walls are relatively thick, injection pressures are relatively low, and injection speeds are low to prevent material shearing. Our process parameters are optimized accordingly:
Drying: PET pellets are dried to <50 ppm moisture content at 150–170°C for 4–6 hours before processing. This prevents hydrolysis and IV loss.
Melt Temperature: PET melt temperature ranges from 270–295°C; for GF-PET, 290–315°C.
Injection Speed: Fast enough to prevent premature solidification, but controlled to prevent shear-induced brittleness, with shots completed within 4 seconds.
Holding Pressure and Time: Pressure is carefully optimized — too high causes excessive swelling and flash, too low results in sinks and voids. Holding time is matched to part geometry without exceeding material residence limits.
Heat Insulation and Venting: Between the mold and machine platen, we install heat insulation boards approximately 12mm thick to maintain thermal stability. Adequate exhaust venting is provided in the mold, with vent depth generally not exceeding 0.03mm to prevent flashing while ensuring gases can escape.
Dimensional Stability Control
In-Mold Sensors: Our machines are equipped with ultrasonic wall thickness sensors that monitor wall thickness variations in real time and automatically compensate packing pressure. Optional in-mold temperature and pressure sensors enable closed-loop control of cavity conditions.
Mold Temperature Controllers: Each mold is paired with dedicated mold temperature controllers providing zone-specific temperature regulation. For PET preforms, maintaining low and uniform mold temperature with fast cooling speed is essential to prevent crystallization (white haze or opacity).
Batch-to-Batch Consistency: For a typical preform product, consecutive production batches over a one-week period demonstrate critical feature variation ≤ 0.02mm. The value to you: identical performance from batch to batch, no re-qualification costs, and predictable blow molding results.
Visual Quality Standards
We achieve the following quality levels for your preform products:
Optical Clarity (Cosmetic PET Preforms): Transparent components with no bubbles, no flow lines, no splay, and no crystallization haze — meeting the highest standards for premium packaging.
Surface Roughness: High-gloss preforms achieve Ra ≤ 0.2μm.
Color Consistency: Automated vision systems detect even minor color inconsistencies ensuring every preform meets your exacting requirements.
Special Material Capabilities
Beyond standard PET, we have extensive experience with a wide range of engineering thermoplastics, including:
PC/ABS, PC — for impact-resistant packaging and structural components
PPS + 40% GF — for high-temperature, chemical-resistant applications
PEEK — for premium medical and high-performance packaging
PTFE/PFA — for high-purity and chemical-resistant requirements
PA6 + GF30% — for reinforced structural applications
PBT — for electrical and automotive packaging components
PEI/PPS/LCP — for ultra-high-temperature performance
Liquid Silicone Rubber (LSR) — for two-component overmolded seals and gaskets
Regulatory Compliance: For cosmetic preforms, we offer materials meeting FDA and EU safety standards, ensuring compliance for global cosmetic markets. We can provide documented flame ratings (UL94 V-0) and weathering test data (UV 3,000 hours without discoloration).
Section Four: Full-Service Support — Reducing Customer Management Costs
Ansix Tech is more than a supplier — we are a manufacturing partner that manages complexity so you can focus on your core business.
Early Engagement and DFM (Design for Manufacturability)
Pre-Contract DFM Reports: Before any investment, we provide comprehensive mold feasibility reports that analyze:
Draft angle requirements for your specific preform geometry
Wall thickness optimization recommendations for uniform cooling and material distribution
Gate location options with trade-off analysis
Ejector pin mark location allowances
Mold flow simulation results
Potential molding issues (weld lines, air traps, sink marks) with recommended mitigations
The value to you: problems are identified and solved before spending on tooling — no expensive surprises after molds are cut.
Sampling and Iterative Validation
T0 to T3 Sample Production: We provide samples at each trial stage, with improvement reports accompanying each iteration. Our approach allows rapid exchange of inserts to validate different design options without rebuilding the entire mold.
Small-Batch Validation: Before committing to mass production, we provide 100 to 500 trial parts for your validation. During this phase, we document production yield and CPK statistics to confirm process capability, ensuring your production line receives parts that are ready to run without adjustment.
Maintenance and Spare Parts
Spare Parts Kit: Every mold ships with a complete kit of wear parts — including ejector pins, core pins, and critical cavity components — so you have replacements on hand when needed.
Preventative Maintenance Schedule: We provide documentation for maintenance at every 200,000 cycles, including recommended inspection points and lubrication procedures.
Lifetime Repair Service: For the life of the mold, we offer repair service with cost-based pricing for non-warranty work. We maintain stock of common replacement components in our service centers, minimizing your downtime.
Section Five: Differentiated Value and Cost Optimization
Problem-Solution Mapping: Customer Value in Action
Customer Concern Ansix Tech Solution Delivered Value
Frequent mold repairs disrupting orders 2,000-cycle pre-delivery aging test with wear report; 3-year mold structure warranty Predictable production uptime; lower maintenance spending
High flash/scrap requiring manual finishing 0.005mm part-line fit with self-compensating clamp force; flash ≤ 0.03mm per batch Eliminated manual deflashing; lower labor costs; higher material yield
Inconsistent dimensions batch to batch Ultrasonic wall thickness sensors; real-time packing pressure compensation; closed-loop control Set-and-forget production; zero re-qualification costs; predictable downstream performance
Long mold repair cycles In-house electrode machining and EDM workshop; 24-hour turn-around for standard repairs Minimal production interruption; reduced inventory of safety stock
Cost Optimization Through Material, Process, and Efficiency
Ansix Tech achieves significant cost reductions through three interconnected approaches:
1. Material Optimization
Lightweighting: Through advanced hot runner balance and precision mold design, we enable thinner preform walls — saving resin per part without compromising performance.
Recycled Material Capability: Our processes can accommodate up to 25% recycled PET content, provided regrind is thoroughly dried, supporting your sustainability goals while reducing material costs.
Reduced Scrap: Through precision molding and automated inspection, we consistently achieve scrap rates well below industry averages.
2. Process Optimization
Reduced Cycle Times: PET injection molding requires careful optimization of process parameters such as melt temperature (285°C), packing pressure (70 bar), and cooling time (as low as 1.8 seconds). Our validated processes consistently achieve cycle times in the 10–12 second range for standard preforms.
Energy Efficiency: All-servo drive systems and optimized pump technologies reduce energy consumption by 20%+ compared to conventional hydraulic presses.
Higher Cavitation: By specifying higher cavity counts on appropriate machine platforms, we increase output per machine hour without increasing labor or floor space.
3. Efficiency Optimization
Automation Integration: Our systems are ready for automated take-out robots, vision inspection, and conveyor integration — minimizing manual handling and inspection labor.
Post-Mold Cooling: For high-cavitation preform molds, post-mold cooling positions enable faster in-mold cooling time and shorter overall cycles.
Total Cost of Ownership (TCO) Reduction
When you choose Ansix Tech, you are not just buying molds or preforms — you are investing in lower total cost of ownership:
Lower Tooling Amortization: With mold lives exceeding 1,000,000 cycles for standard materials, tooling costs are spread over more parts, reducing per-part cost.
Lower Operating Costs: Energy-efficient machines, optimized processes, and reduced scrap rates all contribute to lower per-part operating expenses.
Lower Logistics and Inventory Costs: Our ability to deliver large volumes on time reduces your need for safety stock, while our global manufacturing footprint minimizes shipping distances to your markets.
Lower Quality Failure Costs: Our CPK ≥ 1.33 quality standards and batch-to-batch consistency mean you never face costly production line stoppages, rework, or customer rejections due to out-of-spec preforms.
Material Selection and Raw Material Specifications
For PET preforms, the raw material is the foundation of product quality. At Ansix Tech, we offer comprehensive material selection services:
PET Resin Specifications:
Intrinsic Viscosity (IV): We track IV drift to ±0.02 dL/g — larger drifts cause inconsistent burst strength and thickness distribution
Moisture Content: Maintained at <50 ppm (typically 20–40 ppm) to prevent hydrolysis and IV loss
Acetaldehyde (AA): For sensitive applications, we maintain AA < 10 ppm in preforms to prevent taste/odor issues
Weight Consistency: Cavity-to-cavity weight variation maintained within ±0.2–0.5%
Cosmetic Preform Materials: For cosmetic packaging, we offer materials with UL94 V-0 flame rating and UV resistance for 3,000+ hours of sun exposure without yellowing or brittleness.
Process Validation and Quality Assurance
Our quality validation process is comprehensive and documented:
Incoming Material Validation:
Resin moisture testing (Karl Fischer or moisture analyzer)
IV testing per lot (solution viscometry)
AA testing for taste-sensitive applications
Regrind quality verification (particle size, moisture, contamination)
In-Process Quality Control:
Continuous weight monitoring per cavity
Real-time process parameter tracking via MES
Polarized-light inspection for stress/birefringence detection (identifies over-packing, uneven cooling, or cavity mismatch)
Visual inspection under consistent lighting for gate blush, splay, black specs, bubbles, and short shots
Final Inspection and Testing:
Automated vision inspection for dimensional and visual defects
CMM verification of critical neck finish dimensions (thread OD/ID, tamper band, sealing land)
Blow molding test samples from each batch to validate stretch-blow performance
Full dimensional report per batch
Packaging and Delivery
Once inspected and approved, preforms are:
Counted and packed in clean, sealed containers
Shipped in dust-free packaging preventing contamination
Stored in temperature-controlled environments before transport
Ready for receipt at your bottle-blowing facility, where they will be reheated and expanded into final bottle shapes
The Ansix Tech Promise
At Ansix Tech, we view every mold as more than a piece of steel — it is your printing press for generating value. When we design your mold, we simultaneously plan its production rigidity, venting strategy, cooling balance, and temperature uniformity — ensuring that when it arrives on your production line, it delivers:
Plug-and-play readiness: No tuning required
Minimal flash: Eliminating costly secondary finishing
Maximum lifespan: Protecting your capital investment
We invite you to experience the Ansix Tech difference. Let us review one of your existing products through our complete DFM process. You will see firsthand how we identify and eliminate weld line, air trap, sink, and warpage risks — translating technical complexity into measurable customer value.
Contact us at info@ansixtech.com to begin your next project with Ansix Tech.
Ansix Tech Co Ltd
If you have any plans related to 20-thread thread, 6.5g, 9g, 11g, 13g, 15g, long and short preforms, PET bottle preforms, cosmetic preforms , 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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