Gas-Assisted Molding of Engine Cooling Water Pipes (Using Gas-Assisted Bending Dies)
Gas-Assisted Molding of Engine Cooling Water Pipes (Using Gas-Assisted Bending Dies)
Mastering the Curve: How Ansix Tech is Redefining Engine Cooling Pipe Manufacturing with Gas-Assisted Molding
SHEZHEN, CHINA — In the modern internal combustion engine, where operating temperatures can soar past 120°C and vibration is constant, the humble cooling water pipe is an unsung hero. Responsible for circulating coolant through the engine block, radiator, and heater core, these components must withstand aggressive chemical environments, extreme thermal cycling, and pressure spikes—all while remaining leak-free for the life of the vehicle.
For decades, automakers were forced to compromise. Traditional rubber hoses offered flexibility but degraded over time. Metal tubing provided durability but added weight, cost, and required complex assembly with multiple joints—each a potential failure point. The ideal solution—a lightweight, corrosion-resistant, single-piece plastic tube with complex three-dimensional bends—remained elusive due to the limitations of conventional injection molding.
That has changed.
Through the strategic application of gas-assisted injection molding (GAIM) combined with precision-engineered bending dies, companies like Ansix Tech are not only manufacturing these critical components but fundamentally transforming the cost-performance equation for automotive OEMs. With over 28 years of manufacturing experience and a vertically integrated approach spanning prototype design to mass production, Ansix Tech has positioned itself at the forefront of this specialized niche.
This article provides a comprehensive examination of Ansix Tech's end-to-end capabilities in gas-assisted molding of engine cooling water pipes. From the initial project initiation and material science behind material selection to the intricacies of Mold Design, manufacturing challenges, process optimization, quality validation, and strategies for cost reduction, we explore how deep technical expertise translates into tangible value for clients.
Part I: The Project Initiation – Solving for Weight, Cost, and Complexity
The decision to replace a multi-component metal-and-rubber cooling line assembly with a single gas-assisted injection molded pipe is rarely simple. It typically begins with a client facing a specific set of challenges: the need to reduce vehicle weight for fuel economy targets, simplify assembly on the production line, or eliminate corrosion issues in a critical cooling circuit.
For Ansix Tech, project initiation is not merely about receiving a part design and quoting a price. It is a collaborative engineering engagement. The process begins with a thorough feasibility analysis centered on the unique demands of gas-assisted molding.
The GAIM Advantage for Cooling Circuits
Gas-assisted injection molding differs fundamentally from conventional injection molding. In a standard process, the mold cavity is completely filled with molten plastic, which then cools and solidifies. For long, tubular components, this presents two major problems: first, solid sections are heavy and material-intensive; second, uneven cooling and shrinkage in thick sections inevitably lead to warpage and sink marks.
GAIM solves both problems by injecting high-pressure nitrogen gas into the molten plastic after a partial or full cavity fill . The gas follows the path of least resistance—typically through designed-in gas channels—creating a hollow core while pushing the melt against the mold walls.
For engine cooling pipes, this offers transformative advantages:
Weight Reduction: Hollow sections can reduce weight by 30% or more compared to solid plastic or metal alternatives .
Elimination of Sink Marks: Internal gas pressure compensates for material shrinkage, eliminating surface defects.
Design Freedom: Complex, three-dimensional bends with consistent wall thickness become manufacturable .
Part Consolidation: Multiple components (tubes, brackets, connectors) can be integrated into a single molded piece, reducing assembly costs and potential leak points.
When a client approaches Ansix Tech with a concept for a cooling pipe—perhaps an S-shaped tube with integrated mounting flanges and sensor bosses—the first step is translating that concept into a manufacturable reality.
Part II: The Foundation of Value – Material Science and DFM
Before any steel is cut for a bending die, two critical upstreAm Processes determine the project's ultimate success: strategic material selection and rigorous Design for Manufacturability (DFM) analysis.
Strategic Material Selection: The Cost-Performance Calculus
Engine cooling components operate in one of the most punishing environments in a vehicle. They are continuously exposed to glycol/water coolant mixtures at temperatures ranging from -40°C to 135°C or higher, under pressures that can reach several bar. The material must resist hydrolysis (chemical degradation by water), maintain mechanical strength at elevated temperatures, and withstand vibration and pressure cycling for years.
Ansix Tech's material philosophy is rooted in "fit-for-purpose" engineering: selecting the most economical material that reliably meets all performance specifications, avoiding the costly over-engineering that plagues many automotive programs .
The Industry Workhorse: PA66 GF30
For many engine cooling applications, Polyamide 66 reinforced with 30% glass fiber (PA66 GF30) represents the optimal balance of performance and cost . This engineering thermoplastic offers:
High Heat Deflection Temperature: Maintains dimensional stability and seal integrity under hood.
Excellent Chemical Resistance: Withstands long-term exposure to coolants, oils, and road salts.
Enhanced Mechanical Properties: Glass fiber reinforcement provides the tensile strength (typically 150-200 MPa) and stiffness required to resist pressure and vibration.
Proven Track Record: Decades of use in automotive coolant systems provide a deep database of long-term performance data.
In the case of Ansix Tech's NW12 cooling water pipe connector project, PA66 GF30 was specified to meet requirements of 3.5 bar pressure and thermal cycling from -40°C to 120°C .
Advanced Alternatives: PPS and Hydrolysis-Resistant Formulations
For more demanding applications—such as turbocharger cooling lines or components in hybrid vehicles where coolant may stagnate and reach higher temperatures—Ansix Tech guides clients toward higher-performance materials.
Polyphenylene sulfide (PPS), such as Celanese's Fortron® PPS, offers exceptional high-temperature performance up to 240°C, outstanding resistance to all automotive fluids, and inherent flame resistance . While more expensive than polyamide, PPS can enable further weight reduction and part consolidation in extreme environments.
A critical challenge specific to gas-assisted molding of polyamides is the surface quality of the internal gas channel. Standard glass-reinforced PA66 can produce rough internal surfaces in GAIM processing, which increases surface area exposed to coolant and raises the risk of glass fiber detachment . To address this, Ansix Tech leverages advanced material formulations. Patent literature describes compositions combining glass fibers with lamellar mineral reinforcements like phlogopite mica in PA66 . These formulations, when processed under optimized GAIM conditions (including the melt expulsion method and specialized annular slit gas injectors), yield smooth internal surfaces with excellent hydrolysis resistance .
Ansix Tech's material database and supply chain relationships allow them to recommend—and source—these specialized compounds, ensuring that the material and the process are co-optimized from the start.
Predictive Precision: Advanced Mold Flow Analysis (DFM)
With material selected, the next challenge is predicting how that material will behave when flowing through complex, three-dimensional mold cavities. Ansix Tech employs sophisticated Mold Flow Analysis (MFA) software to simulate the entire injection molding process digitally .
For gas-assisted components, this simulation is particularly critical. The interaction between the polymer melt and the high-pressure gas creates dynamics that cannot be left to trial and error.
The DFM process for a gas-assisted cooling pipe focuses on several key areas:
Filling Patterns: Engineers simulate the initial melt injection to ensure the cavity fills uniformly before gas introduction. They identify potential "short shots" where melt fails to reach extremities.
Gas Channel Design: The location, size, and geometry of the gas channels are optimized. The simulation predicts how the gas will penetrate the melt—whether it will core out the intended sections cleanly or produce defects like "gas fingering" (irregular penetration) or "blow-through" (gas breaking through the melt front) .
Weld and Meld Lines: In complex geometries with integrated branches or flanges, flow fronts meet to form weld lines—potential weak points. Simulation visualizes these locations, allowing engineers to reposition gates or adjust geometry to move weld lines to low-stress areas.
Air Traps: Trapped air can cause burns or voids. MFA identifies these locations so vents can be precisely placed.
Shrinkage and Warpage: By predicting how the part will shrink as it cools—accounting for anisotropic shrinkage in glass-filled materials—the digital model can be compensated, ensuring the first physical prototype is dimensionally accurate .
According to industry practice, this predictive approach can reduce physical prototyping cycles by up to 70% and dramatically improve first-pass success rates . For Ansix Tech's clients, this translates directly into faster time-to-market and lower development costs.
Part III: The Heart of the Operation – Precision Mold Engineering
The gas-assisted bending die is the single most important asset in the production of engine cooling pipes. It is not merely a tool but a high-precision machine that must perform flawlessly for hundreds of thousands of cycles, managing complex thermal dynamics, high-pressure gas injection, and delicate part ejection.
Ansix Tech's mold engineering philosophy balances durability, performance, and innovative design to maximize the tool's lifecycle value.
Mold Structure and Steel Selection
The design of a gas-assisted mold must accommodate both the plastic melt and the gas injection system. The mold consists of multiple components—cavity plates, cores, slides, and gas injector housings—all machined to tolerances measured in microns .
Steel selection reflects a calculated decision based on production volume, material abrasiveness, and required surface finish. For high-volume cooling pipe molds processing glass-filled materials, Ansix Tech often selects pre-hardened mold steels like P20, 718H, or corrosion-resistant grades like S136 and 2316 .
P20 / 718H: These pre-hardened steels offer excellent machinability and sufficient wear resistance for production runs of hundreds of thousands of parts, providing an optimal balance between tooling cost and durability.
S136 / 2316: For parts requiring high corrosion resistance (due to aggressive polymers) or mirror finishes, these stainless grades are specified.
The Cooling Revolution: Conformal Cooling Channels
In injection molding, the mold functions as a thermal exchange device. It must rapidly heat the incoming melt (to prevent premature freezing) and then extract heat efficiently to solidify the part. The cooling phase typically accounts for 50-80% of the total cycle time, making it the single largest driver of per-part cost.
Traditional cooling systems use straight-drilled channels, which often cannot follow the complex contours of a curved cooling pipe. This leads to uneven cooling, longer cycle times, and part warpage.
Ansix Tech addresses this limitation by implementing conformal cooling channels in critical mold inserts . Using metal additive manufacturing (3D printing), cooling channels are created that precisely follow the geometry of the mold cavity at a near-constant distance. The impact is transformative:
Cooling Method Heat Transfer Efficiency Temperature Uniformity Cycle Time Impact
Traditional Straight-Drilled Limited by line-of-sight geometry Poor; hot spots common Baseline
Conformal Cooling (3D Printed) Optimized, follows part contour Excellent; uniform cooling Up to 30% reduction
Comparison of cooling methods in injection mold design .
For a cooling pipe produced in volumes of 500,000 units annually, a 30% reduction in cycle time compounds into massive efficiency gains—reducing machine hour requirements, energy consumption, and ultimately, the cost per part.
Runner, Gating, and Gas Injection Systems
The delivery of melt and gas into the cavity requires careful orchestration.
Runner Systems: Depending on the part geometry and production volume, Ansix Tech designs either cold runner or hot runner systems. Cold runners are simpler and lower-cost for prototyping or lower volumes . Hot runner systems, while more expensive upfront, eliminate runner waste, reduce cycle time, and improve melt consistency for high-volume production .
Gate Design: The gate location is critical for controlling melt flow and fiber orientation. For tubular components, gates are often positioned at flanges or end fittings to ensure smooth flow along the tube axis. Ansix Tech uses mold flow analysis to validate gate placement, ensuring that weld lines are minimized and that gas injection can proceed without disruption.
Gas Injection: The gas injection system must deliver high-pressure nitrogen (typically 100-300 bar) at precisely the right moment . Ansix Tech integrates gas injectors—often specialized annular slit designs with labyrinth seals to prevent melt backflow—directly into the mold . The timing and pressure profile of gas injection are critical parameters controlled by dedicated gas assist units.
Ejection System Design
Ejecting a long, thin-walled, still-warm tube without distortion requires careful engineering. Ansix Tech designs ejection systems that apply uniform force across the part. For cooling pipes, this may involve a combination of:
Ejector pins at flanges and reinforced sections.
Sleeve ejectors around core pins.
Lifters or slides for parts with undercuts or integrated clips.
Air poppet valves to break vacuum and assist release.
The goal is to protect critical sealing surfaces and O-ring grooves from damage during ejection .
Part IV: Manufacturing the Mold – Precision at Every Step
Translating a complex mold design into a physical tool requires a multi-stage manufacturing process, each demanding precision and rigorous quality control.
The Mold Manufacturing Workflow
Ansix Tech's mold manufacturing process follows a structured workflow designed to ensure accuracy and repeatability :
- Material Preparation: Selected steel grades (e.g., 718H, S136) are procured with certified mill test reports and cut to rough dimensions.
- Rough Machining: CNC milling and turning operations remove bulk material to create the mold base, cavity blanks, and core inserts, with excess stock left for finishing.
- Heat Treatment (if required): For hardened tool steels, the mold components undergo heat treatment (quenching and tempering) to achieve the desired hardness, followed by stress relieving to ensure dimensional stability.
- Finishing Machining: High-speed CNC machining centers perform finishing cuts to achieve final dimensions and surface finishes. For complex 3D surfaces, this includes 5-axis simultaneous machining.
- EDM (Electrical Discharge Machining): For intricate details, sharp internal corners, or features impossible to mill, sinker EDM and wire EDM are used. Graphite or copper electrodes are machined to replicate the desired geometry, and electrical sparks erode the steel to precise shapes.
- Conformal Cooling Fabrication (Additive Manufacturing): For inserts requiring conformal cooling, the designs are exported for 3D printing using laser powder bed fusion. These inserts are printed from tool steel powder, post-processed (heat treated), and then finish machined on critical mating surfaces.
- Fitting and Assembly: All machined components are carefully fitted together. Guide pins, bushings, ejector plates, and gas injector assemblies are installed. The mold is assembled and checked for alignment and smooth operation.
- Surface Treatment: Depending on the application, molds may receive surface treatments such as nitriding, PVD coating, or chrome plating to enhance wear resistance and release properties .
- Debugging and Mold Trial: The completed mold is installed in an injection molding machine for trial runs. Engineers verify filling, gas penetration, ejection, and cycle time. First-shot parts are measured against the CAD model, and any necessary adjustments are made .
This meticulous process ensures that when the mold ships to production, it performs exactly as designed.
Part V: Mastering the Process – Scientific Molding and Optimization
A perfect mold is necessary but not sufficient for success. The dynamic interaction between the mold, the molding machine, the material, and the gas assist system must be precisely controlled. Ansix Tech employs scientific (or decoupled) molding principles to establish robust, repeatable production processes.
Process Development for Gas-Assisted Components
For a typical engine cooling pipe, the injection molding cycle involves several distinct phases :
Phase 1: Melt Injection: The screw advances, injecting a controlled volume of molten plastic into the mold cavity. In the "short shot" method (common for GAIM), the cavity is only partially filled (e.g., 70-95%) at this stage .
Phase 2: Gas Injection: With a precisely controlled delay (to allow a skin layer to form), high-pressure nitrogen is injected through the gas injectors. The gas penetrates the melt, displacing the core material and pushing it into the unfilled extremities of the cavity. The gas pressure is carefully profiled—too low, and the part won't fully pack; too high, and blow-through can occur.
Phase 3: Gas Hold Pressure: Gas pressure is maintained during cooling to compensate for material shrinkage, preventing sink marks and ensuring dimensional stability.
Phase 4: Cooling: The part continues to cool under gas pressure until it is rigid enough to be ejected. The conformal cooling system works to extract heat uniformly and rapidly.
Phase 5: Gas Venting and Ejection: Gas pressure is released, the mold opens, and the ejection system pushes the part out. The part is then typically handled by a robot to prevent damage.
Process Optimization for Efficiency and Cost Control
Every second shaved from the cycle time translates directly into cost savings. Ansix Tech's process optimization focuses on several levers:
Injection Speed and Pressure: Multi-stage injection profiles are developed to fill the cavity rapidly without causing jetting or shear-induced degradation. For glass-filled materials, controlling flow speed also influences fiber orientation, which affects mechanical properties .
Gas Delay and Pressure Profiling: The delay between melt fill and gas injection is optimized based on material temperature and mold cooling. Too short, and gas may finger unpredictably; too long, and the melt skin may be too thick to permit efficient coring. Gas pressure is profiled to maintain a stable bubble front .
Cooling Time Optimization: Using data from thermal sensors and mold flow simulations, cooling time is aggressively minimized. With conformal cooling, Ansix Tech has demonstrated cooling time reductions of up to 30% compared to conventional designs .
Automation Integration: Molds are designed for seamless integration with robotic part handling and automated downstream operations (e.g., degating, inspection). This enables "lights-out" production, reduces labor costs, and minimizes human error .
Data-Driven Optimization: Ansix Tech uses Design of Experiments (DOE) methodology to systematically vary process parameters (melt temperature, gas pressure, delay time, etc.) and measure their impact on part quality. This data-driven approach identifies the optimal operating window—the set of conditions that produce consistent quality while minimizing cycle time and scrap. Industry data suggests such optimization can reduce energy consumption by 18% while improving dimensional consistency by 32% .
Part VI: Quality Validation – Built-In, Not Inspected-In
In automotive cooling systems, a failure is not a minor inconvenience—it can lead to engine overheating, catastrophic damage, and expensive warranty claims. For Ansix Tech, quality assurance is a proactive, embedded process, not a final inspection step.
In-Process Monitoring and Control
The first line of defense is real-time process monitoring. Ansix Tech's IATF 16949-certified molding facilities employ:
Cavity Pressure Sensors: These sensors, mounted directly in the mold cavity, measure the pressure exerted by the melt and gas during each cycle. The pressure curve serves as a "digital fingerprint" for a good part. Deviations from the established curve—indicating a short shot, over-pack, or gas penetration anomaly—trigger alarms or automatic rejection .
Temperature Sensors: Monitoring melt temperature and mold temperature ensures that thermal conditions remain within the process window.
Automated Optical Inspection (AOI): Vision systems inspect every part for surface defects, flash, or cosmetic issues at cycle speed.
This in-process approach ensures that non-conforming parts are identified and contained immediately, preventing them from entering downstream assembly or shipping.
First Article and Production Validation
Before mass production begins, a comprehensive First Article Inspection (FAI) is performed :
Dimensional Validation: Critical features—including internal diameters, sealing surfaces for O-rings, flange thickness, and mounting hole positions—are measured using Coordinate Measuring Machines (CMM) and optical comparators. Results are compared against the CAD model and engineering drawing to verify compliance with all tolerances.
Functional Testing: Samples undergo rigorous functional tests, including:
Pressure Testing: Parts are pressurized (often above maximum operating pressure) to verify leak-free integrity. Burst tests determine ultimate strength margins.
Thermal Cycling: Parts are cycled between extreme temperatures (e.g., -40°C to 120°C) while pressurized to simulate years of service in weeks.
Coolant Resistance: Long-term immersion in heated glycol/water mixtures verifies hydrolysis resistance.
Vibration Testing: Assemblies are subjected to vibration profiles replicating engine operation.
Statistical Process Control (SPC)
During mass production, Ansix Tech employs Statistical Process Control. Random samples are pulled at defined intervals, and critical dimensions are measured. The data is plotted on control charts. As long as the process remains within established statistical limits, production continues. If trends toward the control limits appear, corrective action is taken proactively—before any non-conforming parts are produced .
Traceability
Every part produced can be traced back to the specific material lot, molding machine, cavity, and production shift through barcoding or direct part marking. This traceability is essential for automotive OEMs managing complex supply chains and warranty obligations.
Part VII: From Production to Delivery – Capacity and Logistics
Manufacturing precision components is only half the equation. Delivering them on time, in the right quantities, and in perfect condition is equally critical to customer success.
Scalable Production Capacity
Ansix Tech operates four production bases in China and Vietnam, with a total of 260 injection molding machines ranging from 30 tons to 2,800 tons . This diverse fleet includes high-speed electric machines from Fanuc and Sumitomo (ideal for precision components) as well as large-tonnage hydraulic machines for bigger assemblies .
For gas-assisted molding projects, this capacity means:
Dedicated production cells configured for specific programs.
Redundancy to handle demand spikes or equipment maintenance without disruption.
Geographic flexibility to serve global customers efficiently.
Packaging and Logistics
Value can be eroded by supply chain delays or damaged goods. Ansix Tech has optimized the final logistical steps:
Protective Packaging: Components are packaged in protective, often customized, recyclable packaging. For delicate cooling pipes with integrated O-ring grooves, this may include dedicated trays that support the parts and prevent contact damage.
Container Optimization: Packaging is designed to maximize container density, reducing shipping costs. For tubular components, specialized orientation and nesting can reduce shipping volume by 30% or more .
Guaranteed Rapid Delivery: With streamlined logistics and strategic location within major manufacturing hubs, Ansix Tech guarantees rapid delivery times, ensuring customers' production lines run without interruption .
After-Sales Support and Continuous Improvement
Ansix Tech's relationship with clients extends beyond shipment. A robust after-sales service and customer feedback mechanism allows the company to monitor product performance in the field and identify opportunities for continuous improvement . Whether it's a slight design tweak to improve assembly ergonomics or a process adjustment to further reduce cycle time, this feedback loop ensures that the value proposition strengthens over time.
Part VIII: The Value Proposition – Reducing Hard Costs Through Integration
Throughout this technical deep dive, a consistent theme emerges: Ansix Tech's ability to reduce clients' "hard costs"—the direct product cost per unit—is not the result of any single tactic. It is the cumulative outcome of an integrated, engineering-driven approach that optimizes every stage of the product lifecycle.
Here is how that cost reduction is achieved:
- Value-Driven Material Selection
By selecting materials that precisely meet (but do not exceed) application requirements, Ansix Tech avoids the cost of over-engineering. PA66 GF30 is specified where it suffices; PPS is reserved for extreme environments. Specialized hydrolysis-resistant formulations are sourced to maximize the processability and performance of polyamides in GAIM . This strategic alignment of material cost and performance is the foundational step in cost control .
- Predictive Digital Engineering
Mold Flow Analysis and DFM are not just quality tools—they are cost avoidance tools. By identifying and resolving potential defects (weld lines, air traps, warpage) in the digital realm, Ansix Tech eliminates the need for expensive and time-consuming mold rework. Reducing physical prototyping cycles by up to 70% directly reduces development costs and accelerates time-to-market.
- Innovative, Efficient Mold Design
The mold is the primary lever for controlling production cost. Conformal cooling technology, by reducing cycle times by up to 30%, directly slashes the largest component of per-part cost: machine time . Robust steel selection and precision manufacturing extend mold life, spreading the tooling investment over more parts and reducing per-part amortization.
- Process Mastery and Waste Reduction
Scientific molding principles create stable, repeatable processes with wide operating windows. This stability is the bedrock of low scrap rates. When the process is in control, every shot produces a good part. Minimizing scrap not only saves material but also maximizes machine utilization and reduces energy consumption per good part. Data-driven optimization further tunes the process for efficiency, reducing cycle time and energy use .
- Integrated Quality Assurance
By building inspection into the process—through cavity pressure monitoring and automated vision—Ansix Tech prevents defects rather than sorting them out after the fact. This eliminates the "hidden factory" cost of inspection labor, rework, and scrap disposal. More importantly, it virtually eliminates the risk of field failures, which carry exponentially higher costs in warranty claims and brand damage .
- Logistics and Supply Chain Optimization
Protective, space-efficient packaging reduces shipping costs. Reliable, on-time delivery prevents customer production line stoppages—one of the most expensive consequences of supply chain failure. By managing the entire chain from material procurement to shipment, Ansix Tech removes uncertainty and cost from the customer's operation.
The result is a compelling value proposition: clients receive components that are impeccably reliable, consistently delivered, and remarkably cost-effective. This is not cost reduction through corner-cutting; it is cost reduction through intelligent engineering and operational excellence.
Conclusion: Partnership Forged in Precision
The gas-assisted molding of engine cooling water pipes represents one of the more sophisticated challenges in modern automotive manufacturing. It demands deep expertise in polymer science, fluid dynamics, thermal management, precision tooling, and process control. Few suppliers possess the integrated capabilities to master all these disciplines.
With over 28 years of manufacturing experience, a relentless focus on value engineering, and a vertically integrated approach spanning design, mold making, and production, Ansix Tech has established itself as a leader in this specialized field. From the initial project initiation and material selection through DFM analysis, precision mold manufacturing, scientific process optimization, and rigorous quality validation, the company delivers not just components but comprehensive solutions.
For global automotive brands and their Tier 1 suppliers facing relentless pressure to reduce weight, cost, and complexity while improving reliability, Ansix Tech offers a proven partnership model. By transforming complex challenges into manufacturable realities, they help clients turn their ideas into reliable, cost-effective products—one precision component at a time.
About Ansix Tech Co., Ltd.
Ansix Tech specializes in the design and manufacturing of products involving Gas-Assisted Molding of Engine Cooling Water Pipes (Using Gas-Assisted Bending Dies). With over 28 years of manufacturing experience, the company operates four production bases in China and Vietnam, with 260 injection molding machines ranging from 30 to 2,800 tons. Ansix Tech is IATF 16949 certified and serves the automotive, medical, and industrial equipment sectors globally.
For more information about gas-assisted molding solutions for engine cooling systems, contact: info@ansixtech.com
Ansix Tech Co Ltd
If you have any plans related to Gas-Assisted Molding of Engine Cooling Water Pipes (Using Gas-Assisted Bending Dies) , 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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