EPS

EPS

 

Ansix Tech Launches Custom EPS Raw Material Formulation Project: Redefining Value in Expanded Polystyrene Manufacturing

Executive Summary

Ansix Tech Co., Ltd., a precision injection molding specialist with over 29 years of manufacturing experience and four production bases across China and Vietnam, has officially announced the launch of its Expanded Polystyrene (EPS) raw material custom formulation project. This strategic initiative marks a significant milestone in the company's evolution from a pure-play molding manufacturer to an integrated solutions provider capable of controlling the entire value chain—from raw material chemistry to finished product delivery. With 260 injection molding machines spanning clamping forces from 30 tons to 2,800 tons and over 30,000 molds manufactured to date, Ansix Tech is uniquely positioned to transform how EPS products are developed, validated, and produced at scale.

 

Part One: Understanding Expanded Polystyrene (EPS) Raw Materials

1.1 Definition and Full Name

Expanded Polystyrene, universally abbreviated as EPS, is a rigid, closed-cell thermoplastic foam material produced from solid particles of polystyrene. The chemical name is Expandable Polystyrene, with the molecular formula (C₈H₈)n. EPS belongs to the family of styrene polymers that are based on at least 50% by weight of styrene and/or alpha-methylstyrene monomers.

 

The material begins its life as small spherical beads—typically ranging from 0.2 mm to 2 mm in diameter—that contain a blowing agent, most commonly pentane, dissolved into the polystyrene base material during production. When these beads are exposed to heat, the pentane vaporizes, causing the beads to expand up to 40-50 times their original volume. The expanded beads are then fused together through steam molding to create lightweight, rigid foam products with exceptional thermal insulation and cushioning properties.

 

EPS is composed of approximately 98% air, making it one of the most resource-efficient materials in terms of raw material consumption. The material is biologically and chemically inert, does not contain chlorofluorocarbons (CFCs), and is fully recyclable.

 

1.2 EPS Raw Material Grades and Classification

EPS raw materials are classified into several grades based on their performance characteristics and target applications:

 

Standard/Regular Grades: Used for general-purpose applications including block molding and standard packaging

 

High Expansion Grades: Designed for achieving very low densities, typically below 18 kg/m³

 

Fast Cycling Grades: Optimized for rapid molding cycles with enhanced processing efficiency

 

Fire Retardant Grades: Contain flame-retardant additives for construction and building applications where fire safety is paramount

 

Modified Grades: Enhanced with graphite or other additives to improve thermal conductivity or other specific properties

 

Specific grade selection depends on the target density. For densities in the 16-24 g/l range, grades such as C-104, C-105, or C-106 are typically required, while densities above 25 g/l demand C-106 or C-107 grades. Premium grades like Lambdapor® 750 STD premium incorporate graphite content to achieve extremely low thermal conductivity at densities below 18 kg/m³. Bulk-dyed grades such as suncolor® protect micro enable the production of colored molded parts with densities above 20 kg/m³.

 

1.3 EPS Technical Data Sheet (TDS) – Key Material Properties

The comprehensive technical data sheet for EPS reveals a material with remarkable properties that make it indispensable across multiple industries:

 

Physical Properties:

 

Density Range: 0.00310 g/cc to 3.50 g/cc (0.000112 to 0.126 lb/in³), with an average value of 0.212 g/cc

 

Particle Size: 100 to 3,150 µm, with an average of 983 µm

 

Water Absorption: 0.03% to 9.00%, with an average of 0.397%

 

Filler Content: 0.30% to 10.5%, averaging 5.17%

 

Mechanical Properties:

 

Tensile Strength (Ultimate): 0.0800 to 1.10 MPa (11.6 to 160 psi), averaging 0.464 MPa

 

Flexural Yield Strength: Varies with density—0.161 MPa at 15 g/L, 0.294 MPa at 20 g/L

 

Compressive Stress: Performance levels are classified based on compressive stress at 10% deformation

 

Thermal Properties:

 

Thermal Conductivity: Lowest at a density of approximately 3.5 pounds per cubic foot (pcf); increases slightly at lower densities and rises rapidly below 1.5 pcf

 

Thermal Insulation: EPS provides excellent thermal resistance, significantly reducing energy consumption and greenhouse gas emissions over the lifespan of buildings

 

Chemical Properties:

 

Pentane Content: Typically minimum 4.5% to 5.0% at the time of packaging

 

Water Content: Maximum 0.3% at the time of packaging

 

EPS is chemically inert and resistant to most acids, alkalis, and salts

 

Processing Characteristics:

 

Pre-expansion: Can be pre-expanded to densities ranging from approximately 11 kg/m³ to 120 kg/m³ depending on the grade and equipment

 

Intermediate Aging: Typically requires 6 to 24 hours of aging between pre-expansion stages

 

Molding: Processable on standard block molding machines and automatic molding machines

 

The material is a flammable solid, and adequate ventilation must be ensured during processing as pentane-air mixtures can be flammable (LEL pentane 1.3% by volume)

 

1.4 EPS Application Fields

EPS is one of the most versatile materials in modern manufacturing, finding applications across a remarkably diverse range of industries.

 

Building and Construction

EPS serves as a premier insulation material in the construction industry due to its excellent thermal resistance, contributing significantly to energy efficiency in buildings. Applications include external wall insulation systems, perimeter insulating panels, flat roof insulation, and geofoam for civil engineering projects. EPS insulation can be installed in all weather conditions and performs effectively even in flood risk zones. The material's lightweight nature and ease of processing make it ideal for green building initiatives, where it continues to dominate as a preferred material.

 

Packaging and Protective Applications

EPS provides the necessary lightweight, insulating, and protective properties for efficient packaging. Its low density makes it ideal for lightweight packaging applications, protecting products during transportation and storage. Common applications include protective packaging for electronics and appliances, fresh produce containers that maintain optimal temperatures over long distances, fish boxes that preserve freshness, and temperature-sensitive pharmaceutical packaging.

 

Automotive Industry

EPS is used in automotive applications including interior and exterior components, hot-water insulation, and pipe insulation. The material's impact resistance and lightweight nature contribute to vehicle weight reduction and improved fuel efficiency.

 

Civil Engineering and Geofoam

EPS geofoam is used as lightweight fill for reduction of horizontal and vertical earth pressure, frost insulation of roads and railways, and other civil engineering applications. The material's dimensional stability and consistent performance make it reliable for infrastructure projects.

 

Food Packaging and Consumer Goods

EPS is widely used for disposable food containers and cups. Special grades such as suncolor® protect micro are manufactured from polystyrene and additives suitable for food packaging in accordance with EU directives.

 

Acoustic Applications

EPS offers good sound absorption properties, finding use in acoustic panels and packaging for noise-sensitive products.

 

Part Two: Ansix Tech's EPS Custom Formulation Project

2.1 Project Overview and Strategic Rationale

Ansix Tech's EPS raw material custom formulation project represents a fundamental shift in how the company approaches product development. Rather than accepting off-the-shelf raw materials with inherent limitations, Ansix Tech now possesses the capability to engineer EPS formulations that are precisely tailored to specific product requirements, molding equipment characteristics, and production economics.

 

The project leverages Ansix Tech's deep manufacturing heritage—over 29 years of integrated injection molding and mold manufacturing experience—and its extensive infrastructure, including 260 injection molding machines featuring leading brands such as Fanuc, Sumitomo, Toshiba, Nissei, Engel, and Arburg. The company's four production bases in China and Vietnam provide both the scale and the geographic flexibility to serve global customers with consistency and efficiency.

 

2.2 Value Proposition: What Custom Formulation Delivers to Customers

Material Performance Optimization

The custom formulation capability allows Ansix Tech to engineer EPS materials that deliver superior performance for specific applications. Whether the requirement is for extremely low thermal conductivity, enhanced flame retardancy, specific density targets, or improved impact resistance, the formulation can be adjusted at the molecular level. This eliminates the compromise that customers often face when forced to select from a limited menu of standard grades.

 

Application-Specific Property Tuning

Different applications demand different material characteristics. For packaging applications, the focus may be on cushioning efficiency and lightweight construction. For construction applications, thermal insulation and fire safety are paramount. For automotive components, dimensional stability and mechanical strength under varying temperatures are critical. Ansix Tech's custom formulation capability ensures that each material is optimized for its intended end-use, not merely "good enough" across multiple applications.

 

Process Compatibility

The formulation can be tailored to the specific processing equipment and conditions at Ansix Tech's facilities. This includes optimizing the pentane content for the available pre-expansion equipment, adjusting the molecular weight distribution for specific molding machine characteristics, and fine-tuning the expansion characteristics to match the mold design and cooling system specifications.

 

2.3 Solving Critical Industry Challenges

Raw Material Inconsistency

Raw material fluctuations in EPS are not a sign of "bad" material, but rather the natural variance inherent in a petrochemical-based, gas-loaded polymer. Key variables include pentane content—the blowing agent that is the heart of EPS expansion. If the initial pentane content is too low due to age or poor manufacturing, the expansion performance is compromised. Ansix Tech's custom formulation capability brings these variables under control, ensuring batch-to-batch consistency that translates into predictable molding performance and reduced scrap rates.

 

Inadequate Surface Fusion

Poor surface fusion is one of the most visible and frustrating defects in EPS molding. The most common culprit behind poor fusion is inadequate heating—EPS beads require sufficient thermal energy to soften and expand against each other, creating the pressure needed for molecular bonding. By engineering the formulation to match the heating characteristics of specific molds and molding equipment, Ansix Tech can eliminate this defect at its source.

 

Density Variation and Dimensional Instability

Density variations across molded parts lead to inconsistent performance and increased reject rates. The custom formulation project enables precise control over expansion characteristics, ensuring uniform density distribution throughout the molded part. Dimensional stability is evaluated under elevated temperature and humidity to detect warping or shrinkage over time—critical for applications where precise dimensions are non-negotiable.

 

2.4 Material Selection and Component Specification

The EPS raw material development process begins with a thorough understanding of the customer's application requirements. Ansix Tech's engineering team works collaboratively with customers to define:

 

Target Density: The required foam density, which directly impacts mechanical properties, thermal performance, and cost

 

Mechanical Requirements: Tensile strength, compressive strength, flexural properties, and impact resistance

 

Thermal Requirements: Thermal conductivity targets and operating temperature range

 

Regulatory Requirements: Fire retardancy standards, food contact compliance, environmental regulations

 

Processing Constraints: Molding machine capabilities, cycle time targets, and production volume requirements

 

Based on these specifications, the appropriate EPS grade is selected or custom-formulated. Key material parameters include:

 

Polystyrene Base Resin: Molecular weight, molecular weight distribution, and styrene content

 

Blowing Agent: Pentane content and type, typically 4.5% to 6.4% by weight

 

Additives: Flame retardants, colorants (bulk-dyed options), graphite for thermal enhancement, and other performance modifiers

 

Bead Size Distribution: Particle size range from 0.2 mm to 2 mm, optimized for the specific molding application

 

2.5 Comprehensive Quality Validation

Raw Material Incoming Inspection

Every batch of EPS raw material undergoes rigorous incoming inspection. Critical parameters tested include pentane content (ensuring it meets the specified minimum of 4.5-5.0%), water content (maximum 0.3%), bead size distribution, and bulk density.

 

Pre-Expansion Validation

The pre-expansion process is validated to ensure that the material achieves the target pre-expanded density. For graphite-enhanced grades like Lambdapor® 750 STD premium, two-stage expansion may be required to achieve densities as low as 11 kg/m³. The intermediate aging time is verified—typically 6 to 24 hours—to ensure optimal molding performance.

 

Molding Process Validation

Molding validation includes:

 

Steam pressure and temperature optimization

 

Cooling system performance verification

 

Cycle time validation

 

Part density and weight consistency checks

 

Visual inspection for surface fusion quality

 

Dimensional verification against specifications

 

Finished Product Testing

Comprehensive testing of finished products includes:

 

Density measurement

 

Compressive strength testing

 

Thermal conductivity measurement (where applicable)

 

Dimensional stability testing under temperature and humidity variations

 

Flame retardancy testing (for fire-rated grades)

 

2.6 Cost Reduction Through Material and Process Optimization

Material Cost Optimization

By customizing the formulation to match the specific application requirements, Ansix Tech eliminates the cost of over-engineering. Customers no longer need to pay for performance characteristics they don't require. Additionally, the ability to optimize the expansion characteristics means less material is wasted in achieving the target density.

 

Cycle Time Reduction

Cycle time is a critical driver of production cost. Traditional EPS molding cycles range from 90 to 120 seconds. Through optimized material formulations and precision mold design, Ansix Tech has achieved significant cycle time reductions. Improved cooling system efficiency—with cooling channels allowing circulation of cooled water to speed up the cooling process—directly reduces cycle times and improves productivity. The cooling process optimization is based on streamlining heat removal from the mold and the product, improving the resulting molding surface quality.

 

Energy Efficiency

EPS production is energy-intensive, particularly in the steam heating and cooling phases. Future EPS molding lines will use smarter boiler controls, steam control, and closed-loop cooling to reduce energy consumption per part while maintaining short cycle times. Ansix Tech's approach incorporates these principles, with optimized heating and cooling systems that reduce EPS molding operating costs.

 

Scrap Rate Reduction

Scrap rates are a hidden but significant cost in EPS molding. Typical scrap rates can reach 8% or higher with poorly designed molds or mismatched materials. Through careful material selection, precision mold design, and process optimization, Ansix Tech has demonstrated the ability to reduce scrap rates dramatically—from 8% to as low as 1.2% in comparable applications.

 

2.7 Capacity Enhancement and Delivery Assurance

Production Infrastructure

Ansix Tech operates 260 injection molding machines with clamping forces ranging from 30 tons to 2,800 tons, covering everything from small precision components to large-format parts. This extensive capacity ensures that even large-volume orders can be accommodated without compromising quality or delivery timelines.

 

Multi-Site Manufacturing

With four production bases across China and Vietnam, Ansix Tech offers geographic redundancy and flexibility. Production can be distributed across multiple sites to manage capacity constraints, mitigate regional risks, and optimize logistics for different customer locations.

 

Mold Manufacturing Capability

With over 30,000 molds manufactured to date and precision levels achieving 0.002 mm, Ansix Tech possesses world-class mold-making capability. This is critical for EPS molding, where mold quality directly impacts part quality, cycle time, and production economics. The company's comprehensive range of mold types includes hot runner systems that reduce material waste and cycle time while improving part quality through precise gate control.

 

Rapid Prototype-to-Production Pathway

Ansix Tech's integrated capabilities—from material formulation through mold design, manufacturing, and production—enable a seamless transition from prototype to full-scale production. This reduces time-to-market and eliminates the delays and quality issues that often arise when different suppliers handle different stages of the process.

 

Part Three: EPS Mold Design and Manufacturing Excellence

3.1 Mold Flow Analysis (DFM)

Design for Manufacturability (DFM) analysis is conducted for every EPS product to ensure that the design is optimized for efficient and reliable production. This includes:

 

Flow Simulation: Analyzing how the expanded beads will fill the mold cavity

 

Density Distribution Prediction: Ensuring uniform density throughout the part

 

Weld Line Analysis: Identifying and mitigating potential weak points

 

Shrinkage Prediction: Accounting for post-molding dimensional changes

 

3.2 Mold Design Priorities

Cooling System Design

Efficient cooling systems are essential to expedite the cooling process after molding. EPS molds incorporate cooling channels integrated into their design, allowing circulation of cooled water or other cooling media to speed up the cooling process, improve cycle times, and enhance the dimensional stability of molded parts. The ideal mold cooling efficiency for EPS should be represented by cooling the mold surface by 40°C to 50°C.

 

Runner and Gating Systems

The runner system must be designed to ensure uniform filling of all cavities without excessive material waste. Symmetrical layouts with equal flow length to all cavities are preferred. Air vents are installed at various points throughout the runner system or at the molded part's boundary to ensure complete filling and prevent trapped air defects.

 

Ejection System Design

The ejection system must reliably separate the molded part from the mold without damaging the relatively delicate EPS foam. This requires careful design of ejector pin placement and timing.

 

Steam and Vacuum Systems

Steam, cooling water, and vacuum performance must match the EPS density and mold thickness to avoid defects. The steam system provides the heat for bead expansion and fusion, while the vacuum system removes moisture and accelerates cooling.

 

3.3 Mold Manufacturing Challenges and Solutions

Precision Requirements

EPS molds require exceptional precision to achieve the tight tolerances demanded by modern applications. Ansix Tech's achievement of 0.002 mm precision demonstrates the capability to meet these exacting standards.

 

Complex Cooling Channel Geometries

The cooling channels in EPS molds must follow complex paths to ensure uniform cooling across the entire part. This requires advanced machining capabilities and careful design.

 

Surface Finish Requirements

The mold surface finish directly impacts the surface quality of the molded EPS part. Achieving the required finish while maintaining the necessary venting and release properties is a significant manufacturing challenge.

 

Thermal Management

The mold must withstand repeated heating and cooling cycles without distortion or premature wear. Material selection for the mold itself is therefore critical.

 

3.4 Mold Manufacturing Process

The mold manufacturing process follows a structured workflow:

 

Design and Engineering: CAD modeling, DFM analysis, and cooling system design

 

Material Selection: Choosing the appropriate mold steel based on production volume and part complexity

 

CNC Machining: Precision machining of mold components

 

EDM (Electrical Discharge Machining): For complex cavities and fine details

 

Surface Finishing: Polishing and texturing to achieve the required surface quality

 

Assembly and Fitting: Precise assembly of all mold components

 

Testing and Validation: Trial runs to validate mold performance

 

Part Four: EPS Injection Molding Process Excellence

4.1 Molding Process Overview

The EPS molding process involves several critical stages:

 

Pre-expansion: Raw EPS beads are heated with steam to expand them to the target density. The pre-expansion conditions—steam pressure (typically 0.2-0.4 MPa) and temperature (96-106°C)—must be carefully controlled.

 

Intermediate Aging: The pre-expanded beads are stored for 4 to 10 hours to allow the blowing agent to redistribute and stabilize.

 

Mold Filling: The aged beads are blown into the mold cavity using compressed air.

 

Steam Molding: Steam is introduced to heat the beads further, causing them to expand and fuse together into a solid foam part.

 

Cooling: Water is circulated through the mold cooling channels to cool the part below its softening point.

 

Ejection: The cooled part is ejected from the mold.

 

Post-Molding Conditioning: The part may require additional aging to allow residual blowing agent to escape and to achieve final dimensional stability.

 

4.2 Molding Difficulties and Solutions

Incomplete Fusion: Results from inadequate heating or improper steam distribution. Addressed through optimized steam system design and process parameter adjustment.

 

Density Variation: Caused by inconsistent bead filling or non-uniform heating. Addressed through mold flow analysis and precision process control.

 

Surface Defects: Including poor surface fusion, voids, and cold spots. Addressed through optimized heating profiles and mold design.

 

Dimensional Instability: Resulting from inadequate cooling or post-molding shrinkage. Addressed through optimized cooling system design and proper aging protocols.

 

4.3 Process Optimization for Efficiency and Cost Control

Steam Optimization: Precise control of steam pressure and duration to achieve complete fusion with minimum energy consumption.

 

Cooling Optimization: Efficient cooling system design reduces cycle time and improves part quality. Cooling cycle times can be reduced by 10% to 50% or more through optimized cooling system design.

 

Automation: Automated material handling, part removal, and quality inspection reduce labor costs and improve consistency.

 

Data-Driven Process Control: Predictive parameter adjustment using historical data enables identification of optimal starting parameters for new molds or materials, reducing setup time from hours to minutes.

 

4.4 Quality Control and Assurance

In-Process Inspection: Continuous monitoring of critical process parameters including temperature, pressure, and cycle time.

 

Statistical Process Control (SPC) : Tracking of key quality metrics to identify trends and prevent defects before they occur.

 

Dimensional Inspection: Verification that all critical dimensions meet specifications.

 

Functional Testing: Testing of finished parts under simulated service conditions.

 

4.5 Packaging and Rapid Delivery

The entire manufacturing process—from raw material receipt through molding, quality inspection, packaging, and shipping—is optimized for efficiency. Packaging is designed to protect the relatively fragile EPS products during transportation while minimizing packaging material waste. Ansix Tech's multi-site manufacturing network enables rapid delivery to customers worldwide.

 

Part Five: Ansix Tech's Industry Experience and Value Proposition

5.1 Three Decades of Manufacturing Excellence

Founded in Hong Kong in 1998, Ansix Tech has accumulated over 29 years of integrated injection molding and mold manufacturing experience. This deep heritage provides an institutional knowledge base that cannot be replicated by newer entrants to the market. The company has manufactured more than 30,000 molds, achieving precision levels of 0.002 mm—a testament to the technical expertise that underpins every project.

 

5.2 Comprehensive Technical Capabilities

Ansix Tech's capabilities span the entire product development and manufacturing lifecycle:

 

Material Science: Custom EPS formulation and raw material optimization

 

Product Design: DFM analysis and design for efficient manufacturing

 

Mold Design and Manufacturing: Precision mold making with advanced cooling and gating systems

 

Injection Molding: 260 machines with clamping forces from 30 to 2,800 tons

 

Quality Assurance: Comprehensive testing and validation protocols

 

Assembly and Logistics: Complete product assembly and global delivery

 

5.3 Customer-Centric Approach

Ansix Tech has built its reputation through a deeply customer-centered approach that transforms complex technical capabilities into tangible business value. This means:

 

Understanding the customer's business objectives, not just their technical requirements

 

Providing solutions that reduce total cost of ownership, not just piece-part price

 

Ensuring reliable delivery that supports the customer's production schedules

 

Offering technical support throughout the product lifecycle

 

5.4 Proven Cost Reduction Results

Ansix Tech's cost reduction strategy operates on three interconnected fronts:

 

Material Cost Reduction: Through custom formulation that eliminates over-engineering and optimizes material utilization.

 

Process Cost Reduction: Through cycle time optimization, energy efficiency improvements, and scrap rate reduction. As demonstrated in comparable applications, cycle time reductions of 22% and scrap rate reductions from 8% to 1.2% are achievable.

 

Supply Chain Cost Reduction: Through integrated manufacturing that eliminates the costs and risks of multiple suppliers, and through geographic manufacturing flexibility that optimizes logistics.

 

5.5 Reliability and Long-Term Partnership

Ansix Tech's 29-year track record provides customers with the confidence that comes from working with an established, financially stable partner. The company's investment in advanced manufacturing equipment, quality systems, and technical talent demonstrates a long-term commitment to the industry and to its customers.

 

Conclusion

Ansix Tech's EPS raw material custom formulation project represents a significant advancement in the expanded polystyrene industry. By bringing raw material development in-house and integrating it with world-class mold design, manufacturing, and injection molding capabilities, Ansix Tech offers customers a complete solution that delivers:

 

Superior Product Performance: Through materials engineered for specific applications

 

Reduced Total Cost: Through optimized material usage, faster cycle times, and lower scrap rates

 

Faster Time-to-Market: Through integrated development and manufacturing

 

Reliable Quality: Through comprehensive validation and quality control

 

Dependable Delivery: Through multi-site manufacturing capacity

 

As EPS continues to play a pivotal role in construction, packaging, automotive, and countless other applications, the ability to customize raw material formulations while maintaining world-class manufacturing standards will become increasingly valuable. Ansix Tech, with its 29 years of experience, 260 injection molding machines, 30,000 molds manufactured, and four production bases across Asia, is uniquely positioned to lead this evolution.

 

The company's message to customers is clear: Whether you need a standard EPS grade or a custom-formulated material for a specialized application, Ansix Tech has the expertise, infrastructure, and commitment to deliver the quality, cost, and reliability your business demands. The EPS custom formulation project is not merely a new service offering—it is a fundamental reimagining of what a manufacturing partner can and should provide in the modern global economy.

Ansix Tech Co Ltd

If you have any plans related to EPS , 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

 

#www.ansixtech.com #ansixtech.com #EPS #EPS Material #EPS Canopy Mold injection mold companies #Ansix #Ansix moulds #Ansix china #Ansix tech china #Ansix tech company #Ansix facotry  #EPSinjection molding #EPSinjection tools #EPSinjection moulds #EPSplastic mould #EPSplastic tools #Ansix Tech #Ansix molds #Ansix injection molding  #Ansix mold factory #injection molding Customized stainless steel float switch for water level, oil level, high liquid level alarm#Ansix mold factory #EPSchina #EPSmolds  #injection factory #EPSinjection molding #EPSinjection molding factory #injection molding company #EPSinjection mold companies #EPSTooling #EPSmold limited #Ansix mold china #Ansix companies #Ansix company China #EPSfacotry #Ansix Tech #Ansix Tech mould #EPSinjection moulding #injection moulding company #Ansix EPSparts injection mold companies #medical injection molding companieschina #EPSchina factory #Ansix moulding companies #Ansix molding company #EPSinjection moulding facotry #Ansix Tech mold #EPSmould #EPSplastic injection molding #ansix plastic mold #Mold manufacturing #EPSparts manufacturing #EPSplastic parts factory #EPSinjection parts mold #EPSPRECISION MANUFACTURING #EPS#China mold #EPSinjection moulding china #EPSmould china #china precision mold #mold in china #EPSmold china #Precision molds #High-precision molds #EPS#Injection molds #EPSFactory #EPSCompany #Super Large Injection Mold Factory #Large Tonnage Injection Molding Factory #EPSCompany #EPSFactory #2800T Injection Molding Factory #3000 Ton Injection Molding #4500 Ton Injection Molding Factory #Large Mold Injection Molding #Large Plastic Mold Injection Molding Factory #Large Injection Mold Manufacturer #Plastic Mold Factory #Injection Mold #Plastic Mold