92mm Neck PET Preform, Plastic Preform, Wide Mouth Plastic Preform, Factory, Cosmetic Bottle
FEATURES
Ansix Tech addresses these challenges through a vertically integrated manufacturing ecosystem that connects precision mold engineering, intelligent injection molding production, and rigorous quality assurance. Every technical specification we define directly targets a specific customer pain point. A 0.005mm mold tolerance translates to zero manual deburring. A 100-cavity hot runner mold with balanced flow delivers 99.8% cavity-to-cavity consistency across millions of cycles. A 10-day simple mold lead time accelerates market entry by weeks.
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Mold Description
Product Materials:
PET PETG
Mold Material:
S136ESR
Number of Cavities:
10
Glue Feeding Method:
Hot runner
Cooling Method:
Water cooling
Molding Cycle
12.5s
- The mold manufacturing process and product material selection
Hard Infrastructure – The Foundation of Manufacturing Excellence
Precision Mold Processing Equipment
The quality of any preform begins with the precision of its mold. Ansix Tech operates a comprehensive suite of advanced machining equipment engineered for the exacting demands of preform manufacturing.
Five-Axis High-Speed Machining Centers enable the production of complex geometries with surface finishes that directly impact preform quality. By achieving 0.002mm positioning accuracy, our five-axis systems ensure that parting lines on wide mouth preform molds remain exceptionally smooth, eliminating post-molding flash that would otherwise require secondary trimming operations. For cosmetic bottle preform molds, where surface finish directly affects final bottle clarity, this precision translates to glass-like transparency without polishing costs.
CNC Electrical Discharge Machining (EDM) capabilities, including sinker and wire EDM systems, handle the intricate details of preform mold manufacturing. The 0.03mm narrow slots and fine micro-holes required for venting and cooling channels in high-cavitation molds are produced with repeatable accuracy. Proper venting prevents trapped gas defects in PET preforms, reducing scrap rates from 3% to below 0.5% in production.
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High-Precision Surface Grinding achieves flatness within 0.002mm across large mold plates—critical for maintaining clamp force distribution across 96-cavity preform molds. Uneven mold plate flatness causes localized flash, increases manual trimming labor, and accelerates mold wear. Our grinding capabilities ensure uniform contact across the entire mold interface.
Injection Molding Machine Fleet
Ansix Tech operates injection molding machines spanning 80 tons to 500 tons, covering the entire range of preform sizes from 5-gram cosmetic preforms to 300-gram wide mouth jar preforms. Each machine features:
All-Servo Electric Drive Systems delivering repeatability accuracy of ±0.1%. For PET preform molding, where IV (intrinsic viscosity) retention requires precise thermal management, servo-driven systems maintain consistent injection speeds and holding pressures across every cycle. A 0.1% variation in shot weight per cavity over 1 million cycles represents less than 1 gram total deviation—ensuring blow molding consistency that eliminates bottle wall thickness variations.
Multi-Zone Temperature Control with independent heating bands on barrel, nozzle, and hot runner systems. PET processing requires melt temperatures between 260°C and 280°C, with each zone independently adjustable to compensate for shear heat generation during screw rotation. Our systems maintain temperature stability within ±1°C, preventing thermal degradation that would raise acetaldehyde levels (the primary cause of taste/odor issues in beverage bottles).
Quick Mold Change Systems reduce downtime between production runs. For cosmetic bottle manufacturers producing multiple SKUs with different preform designs, 15-minute mold changeover times versus industry average 4-hour changeovers translate to significantly higher overall equipment effectiveness.
Inspection and Metrology Equipment
Coordinate Measuring Machines (CMM) with 1.2-micron accuracy verify every critical dimension on finished molds before shipment. Neck finish dimensions—including thread major/minor diameters, support ledge height, and sealing land diameter—are measured to ensure compatibility with standard closures. Every mold undergoes full dimensional reporting with CpK documentation, targeting capability indices of 1.33 or higher on key characteristics.
Optical Comparators and Vision Measurement Systems provide rapid inspection of complex preform features, including gate vestige height (controlled below 0.2mm to ensure proper blowing) and thread profiles. High-speed inspection routines verify 100% of cavities during mold validation, identifying any cavity-to-cavity variation before production begins.
Part Two: Mold Manufacturing Core Competencies – Engineering Excellence Delivered
Comprehensive Steel Selection Matrix
Mold longevity directly correlates with material selection relative to production volume and resin type. Ansix Tech maintains a structured material selection framework matched to specific application requirements:
Mold Component Standard Applications High-Volume Applications Glass-Filled Materials
Mold Base P20 (pre-hardened, 30-32 HRC) 718H (33-38 HRC) 718H
Cavity/Core (Standard) S136 (48-52 HRC, stainless) S136H (48-52 HRC) S136H
Cavity/Core (Abrasive) — 2343/2344/8407 (50-54 HRC) H13/2344
Cavity/Core (High-Polish) NAK80 (40-44 HRC) NAK80 NAK80
Wear Components SKD11 (58-62 HRC) DC53 (60-63 HRC) DC53
Cooling Components — Beryllium Copper —
For 92mm Neck PET Preform molds, we specify S136 or 2344 cavity steel heat-treated to 48-52 HRC, providing the hardness needed for 2 million+ cycles while maintaining the surface polish essential for PET preform clarity. Each steel batch is accompanied by material certification and documented heat treatment curves, enabling full traceability from raw material to finished mold.
Performance Commitments Based on Material Selection:
Standard plastic materials (non-filled): 1.5–2.0 million cycles guaranteed
Glass-fiber reinforced materials: 500,000–800,000 cycles with periodic maintenance
Mold structural warranty: 2 years on core components (excluding wear parts)
Manufacturing Process Workflow
The journey from design to deliverable mold follows a structured process designed for precision and speed:
Stage 1: Rough Machining (3-5 days) – Raw steel blocks undergo rough milling to establish basic geometry, removing 80% of material while leaving 0.5mm finishing allowance. This stage allows stress relief to prevent distortion during finish machining.
Stage 2: Heat Treatment (2-4 days when applicable) – Cavities and cores requiring hardened specifications undergo vacuum heat treatment with documented temperature and time curves, followed by tempering to achieve target hardness without brittleness.
Stage 3: Precision Finishing (5-10 days) – Five-axis milling completes cavity and core finishing to final dimensions. Surface finishes achieve Ra 0.05μm or better—essential for transparent PET preforms where any surface imperfection becomes visible in the blown bottle.
Stage 4: EDM Processing (2-5 days) – Wire EDM creates cooling channel connections and narrow slots; sinker EDM produces gate details and complex cavity features.
Stage 5: Assembly and Fitting (2-3 days) – All components are assembled, with slides and ejector systems fitted. Every moving component is tested for smooth operation.
Stage 6: Mold Trial (2-3 days) – Each mold undergoes a minimum 8-hour production run on an injection molding machine at Ansix Tech facility, with preforms measured for weight uniformity and dimensional accuracy before shipment.
Typical Lead Times:
Simple preform molds (single cavity, standard neck): 10 days
Medium complexity (8-16 cavities, hot runner): 20-25 days
High complexity (48-96 cavities, stack molds): 35-45 days
Express service (premium): 20 days with expedited validation
Gate and Runner System Optimization
Gate design directly determines melt flow quality and preform appearance. Ansix Tech selects gate configurations based on application requirements:
Hot Runner Systems eliminate runner waste entirely—for high-cavitation preform molds (48+ cavities), material savings of 15-25% compared to cold runner systems provide rapid return on investment. For PET, which cannot be reground without IV degradation, hot runners are mandatory for quality-sensitive applications. Our hot runner designs incorporate balanced flow distribution verified through mold flow analysis, ensuring each cavity receives identical melt pressure and temperature.
Valve Gate Hot Runners provide independent cavity shut-off capability, allowing selective cavity deactivation without changing flow balance—valuable when production volumes fluctuate or during mold validation when problematic cavities require isolation.
Gate Location and Design addresses specific application needs. For transparent cosmetic bottle preforms, we position gates away from visible surfaces and incorporate gate vestige control features that leave a 0.2mm maximum protrusion—no manual trimming required. For wide mouth preforms where gate visibility is not a concern, we optimize for fill efficiency rather than appearance.
Cooling System Engineering
Cooling accounts for 60-70% of the injection molding cycle time. Effective cooling system design is the single largest lever for production efficiency.
Ansix Tech engineers conformal cooling channels that follow preform contours, achieving uniform heat extraction across the entire preform length. For 92mm Neck Preforms, where the neck finish area requires different cooling rates than the body section, we implement zone-divided cooling circuits with independent temperature control per zone. Each circuit is flow-tested during mold validation to verify Reynolds numbers exceeding 10,000—ensuring turbulent flow that maximizes heat transfer efficiency.
Performance Outcomes:
Cooling time reduction of 20-35% compared to conventional cooling channel designs
ΔT between cavity and core maintained within 2°C, minimizing warpage
Total cycle times as low as 8-12 seconds for standard PET preforms (depending on weight and cavity count)
Ejection System Design
Preform ejection must be reliable, non-marring, and consistent across millions of cycles. Ansix Tech implements ejection strategies tailored to preform geometry:
Neck Ring Ejection using split neck ring designs ensures the threaded neck finish is released without damage. For cosmetic bottle preforms where cosmetic appearance is critical, our neck ring designs incorporate features that prevent any contact marks on visible surfaces.
Air Ejection Assist for deep-cavity preforms ensures the part lifts off the core uniformly, preventing scratching or surface defects. Air-assist systems are particularly valuable for wide mouth preforms where conventional stripper plates would contact the preform body.
Ejector Pin Placement is documented in DFM reports provided to customers, showing every contact location and expected mark dimensions—eliminating surprises during post-molding assembly.
Part Three: Injection Molding Process Control – Eliminating Customer Anxiety
Process Standardization and MES Integration
Customer fears in injection molding consistently center on three issues: dimensional inconsistency between batches, sink marks and surface defects, and color variation. Ansix Tech eliminates each through systematic process control.
MES (Manufacturing Execution System) Connectivity locks all molding parameters—temperatures, pressures, speeds, and holding profiles—to authorized engineering access only. Every machine in our fleet is networked, providing real-time monitoring and data logging for every shot. When a process deviation occurs, the system automatically flags the affected shots, preventing defective parts from reaching customers.
First Article and In-Process Inspection protocols mandate weight measurement of the first 5 shots from each cavity at startup, followed by hourly sampling throughout production runs. Each cavity is individually tracked, enabling rapid identification of any developing imbalance.
Statistical Process Control (SPC) is applied to all critical characteristics:
Preform weight maintained within ±0.2% across all cavities
Neck finish dimensions tracked with target CpK ≥ 1.33
IV retention within ±0.02 dL/g across production
Dimensional Stability and Warpage Control
Warpage in PET preforms creates downstream blow molding failures—uneven heating produces blown bottles with wall thickness variations that compromise strength and appearance.
Ansix Tech implements Zone-Specific Temperature Control using multiple independent mold temperature controllers. By maintaining core temperature within 2°C of cavity temperature across the entire preform length, we eliminate the temperature gradients that drive warpage.
Real-Time Wall Thickness Monitoring integrates ultrasonic sensors into the injection molding process, providing continuous feedback on preform wall thickness distribution. When thickness deviates from target, the system automatically adjusts holding pressure and time to compensate—before any out-of-spec parts are produced.
Validation Data: In a recent 48-cavity wide mouth preform project, three consecutive production runs separated by 10 days showed key dimension variations below 0.02mm (thread diameter) and 0.03mm (overall length). This consistency allowed the customer to eliminate their incoming inspection step for these dimensions, saving 0.02perpiece—over200,000 annually at their production volume.
Surface Finish and Appearance Quality
Different applications demand different appearance standards. Ansix Tech achieves:
Transparent Cosmetic PET Preforms: Ra ≤ 0.05μm cavity finish, resulting in blown bottles with no visible flow marks, bubbles, or haziness. Preforms exhibit gate blush controlled to invisible under standard lighting.
Wide Mouth Jar Preforms for Food: Vacuum venting systems eliminate trapped gas defects, preventing the white spots or dull patches that would compromise product presentation.
Custom Color Cosmetic Preforms: Colorant dispersion optimized through screw design and back pressure settings, eliminating color streaks or swirls. Batch-to-batch color consistency maintains ΔE < 0.5.
Advanced Material Capabilities
While PET comprises the majority of preform applications, Ansix Tech’s material processing expertise extends across the full spectrum of thermoplastics:
PET: All grades including bottle-grade (0.74-0.84 IV), heat-set grades for hot-fill applications, and recycled content formulations
PETG: For enhanced chemical resistance in cosmetic packaging
PP: For wide mouth jars requiring high temperature resistance
PC/ABS: For impact-resistant cosmetic housings
PPS+40%GF: For high-temperature industrial applications requiring UL94 V-0 flammability rating
PEEK/PEI: For aerospace and medical applications requiring 250°C+ continuous use temperature
LSR (Liquid Silicone Rubber): For overmolding sealing features on preform necks
Part Four: End-to-End Service Integration – Reducing Total Cost of Ownership
Design for Manufacturing (DFM) – Eliminating Risks Before They Occur
The most expensive mold modifications are those made after steel cutting begins. Ansix Tech provides comprehensive DFM reporting before any commitment to mold fabrication.
Pre-Engagement DFM Services include:
Mold Flow Analysis using advanced CAE simulation predicts melt flow behavior, identifies weld line locations, and validates cooling efficiency before mold design is finalized. Our engineering team presents simulation results showing:
Filling pattern analysis identifying any cavity imbalance
Weld line prediction with location mapping
Air trap identification with venting recommendations
Cooling simulation validating cycle time projections
Part Design Consultation identifies potential molding issues early:
Draft angle recommendations (1-2 degrees typical for preforms, 0.5-1 degree for critical features)
Wall thickness optimization to maintain flow while minimizing cycle time
Gate location recommendations balancing aesthetics against flow efficiency
Ejector pin location and expected witness mark positions
Shrinkage compensation values for each material (0.5-0.7% for amorphous PET, higher for semi-crystalline materials)
Commercial Outcomes of DFM: A cosmetic brand customer recently received a DFM report identifying an undercut in their bottle design that would have required a 3-slide mold costing
95,000versusastandardtwo−platemoldat48,000. By modifying the design per our recommendations, the customer saved $47,000 in tooling investment and 6 weeks of delivery time.
Multi-Stage Sampling and Validation
Ansix Tech does not deliver molds without thorough validation. Every mold undergoes:
T0 (First Trial): Initial molding on our machines, producing first shots of each cavity. Results documented with photographs, dimensional measurements, and identification of any issues requiring correction.
T1-T3 (Iterative Trials): Each round addresses corrections identified in prior trials. Customers receive detailed reports including:
Before/after measurements showing correction effectiveness
Updated process parameter recommendations
Blow molding test results using customer-specified or equivalent equipment
Photographic evidence of defect elimination
T4 (Production Validation Run): A minimum 8-hour continuous production run (extended to 24 hours for high-volume applications) produces preforms for blow molding into finished bottles. The run demonstrates:
Process stability across the entire production period
Scrap rate below 0.5% after process stabilization
CpK ≥ 1.33 on all critical dimensions
Consistent blow molding performance
PPAP (Production Part Approval Process) Documentation includes full dimensional reports, material certifications, process parameter sheets, and capability studies—providing everything customers need for internal approval and ongoing quality management.
Small-Batch Pre-Production Verification
Before committing to full-scale production, customers may request 100-500 preform samples molded from the production tool. This small-batch run enables:
Process parameter finalization without large material commitment
Blow molding line validation using actual production tooling samples
Package assembly testing including closure application and torque verification
Customer-specific quality standard confirmation
Pre-production runs identify any customer-specific handling or assembly issues before mass production begins, eliminating the cost and schedule impact of post-production modifications.
Maintenance and Spare Parts Services
Mold maintenance predictability directly impacts production schedule reliability. Ansix Tech structures service packages to eliminate maintenance surprises.
Spare Parts Kit packaged with every mold includes:
Spare ejector pins (complete set, one per cavity)
Spare core pins (minimum two per cavity for critical features)
Spare hot runner nozzles and tips
Complete documentation with replacement part numbers
Preventive Maintenance Schedule provided for every mold specifies lubrication intervals, cleaning procedures, and wear inspection checkpoints.
On-Demand Repair Services with rapid turnaround:
Standard repairs (cavity polishing, minor wear): 24-48 hours
Ejector pin replacement: within 24 hours from spare parts
Cavity replacement (cavity damage requiring new component): 5-7 days
Emergency repairs: expedited service with same-day evaluation
Maintenance Cost Commitment: For customers entering long-term service agreements, we guarantee mold maintenance costs not exceeding industry benchmarks by conducting scheduled inspections and component replacements before failures occur.
Part Five: Cost Reduction Engine – Systematic Value Creation
Material Cost Optimization
Raw material represents 60-80% of total preform production cost. Ansix Tech implements multiple strategies for material cost reduction without compromising quality.
Lightweighting Engineering redesigns preform wall thickness distribution to maintain performance while reducing material consumption. For cosmetic bottle preforms, we evaluate:
Minimum wall thickness requirements for structural integrity
Thickness distribution optimized for blow stretch ratios
Gate size optimization minimizing material consumption in runner systems
Recent Lightweighting Example: A 92mm wide mouth preform originally specified at 180 grams was reengineered to 165 grams—a 15-gram reduction. At a material cost of
1.80/kgforPET,annualsavingsfor2millionpreformsexceeded54,000. Bottle blow molding tests confirmed identical strength and barrier performance.
Regrind and Recycled Content Integration for applications permitting recycled material. Our process control systems accommodate:
Post-industrial regrind up to 100% for non-critical applications
Post-consumer recycled PET (rPET) up to 50% for beverage applications (subject to certification)
Virgin/regrind blends with documented IV retention and color consistency
Bulk Material Purchasing leveraged across multiple customers reduces per-unit material costs. Ansix Tech maintains inventory of high-volume PET grades (including bottle-grade, heat-set, and rPET) purchased at manufacturing volumes—passing savings through to customers.
Process Efficiency Optimization
Cycle time reduction increases output without additional capital investment, directly reducing per-piece manufacturing cost.
Cooling System Enhancement typically reduces cycle times by 10-20% compared to conventional designs. For a 48-cavity preform mold producing 30-gram preforms, a 2-second cycle time reduction (from 12 seconds to 10 seconds) increases daily production by 8,640 preforms—over 2.5 million additional preforms annually.
Hot Runner Gate Optimization eliminates crystallized gate slug formation that plagues many preform molding operations. Our valve gate designs provide clean gate breaks that eliminate manual gate trimming operations, saving 0.005−0.010 per preform in secondary labor.
Automation Integration with pick-and-place robots and downstream conveyors reduces direct labor content. For high-cavitation PET preform production, our fully automated cells operate with a single operator per 4-6 machines, compared to industry standard 1:1 or 1:2 ratios.
Risk Reduction and Defect Prevention
Defects represent pure cost—material consumed producing non-conforming product, labor invested in production, and inspection cost to identify defects before shipment.
Ansix Tech’s quality systems maintain production scrap rates below 0.5% after process stabilization, compared to industry averages of 1-3%. For a customer producing 10 million preforms annually at 0.15each,2.5375,000 in annual waste—entirely avoidable with proper process control.
Downstream Yield Protection extends beyond preform quality to include blow molding performance. Preforms with consistent wall thickness and IV distribution achieve blow molding yields exceeding 99.5%, compared to industry averages of 96-98%. For beverage producers, each 1% of yield loss represents millions of dollars in annual waste.
Ansix Tech Standard PET Preform Weight Ranges
PET preforms are categorized by neck finish type and application. While custom preforms can be manufactured to any specification, industry-standard weight ranges provide a reference for new project planning:
Neck Finish Type Typical Weight Range Typical Applications
18/410 – 24/410 (Cosmetic) 6g – 25g Cosmetic bottles, lotion pumps, travel sizes
28mm PCO 1810/1881 (Beverage) 11g – 69g Water bottles, CSD, juice, thermal
29/25 – 30/25 (Beverage) 10g – 50g Still water, sparkling water
38mm 2-start/3-start (Milk/Juice) 17g – 108g Dairy, juice, edible oil
45mm – 55mm (Wide Mouth) 50g – 300g Food jars, wide mouth bottles
55mm – 89mm (Jumbo) 190g – 450g+ Bulk packaging, gallon containers
For the 92mm Neck specification specifically, typical preform weights range from 180 grams to 450 grams depending on final bottle volume. Lightweighted designs for 1-2 liter wide mouth jars typically target 180-250 grams, while 5-20 liter industrial or bulk containers utilize heavier preforms up to 450 grams.
Conclusion: Technical Capability Delivered as Customer Value
The most sophisticated mold manufacturing capabilities hold no value unless they solve real customer problems. Ansix Tech’s 28 years of preform mold and injection molding expertise has been systematically structured to address every customer concern:
Variable dimensional stability → MES-controlled processes with CpK ≥ 1.33 and real-time wall thickness monitoring
High mold maintenance costs → Premium steel selection with documented heat treatment, spare parts kits, and scheduled preventive maintenance
Slow project launch timelines → DFM reporting before steel cutting, multi-stage sampling, expedited service options
Unpredictable production scrap → Process validation with small-batch pre-production runs, documented PPAP approval
Rising raw material expenses → Lightweighting engineering, regrind integration, bulk purchasing leverage
When customers partner with Ansix Tech for 92mm Neck PET Preform, Wide Mouth Plastic Preform, or Cosmetic Bottle projects, they receive more than molds or production capacity—they receive a manufacturing partner whose entire infrastructure is organized around their success. The technology is sophisticated. The value proposition is simple: predictable quality, controlled costs, and reliable delivery, every cycle.
Ansix Tech Co Ltd
If you have any plans related to 92mm Neck PET Preform, Plastic Preform, Wide Mouth Plastic Preform, Factory, Cosmetic Bottle , 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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