Name: Custom FRP Tube Pultrusion Die for Pultrusion Machine
Brand: Tolike
SKU: FRP Tube Pultrusion Mold
Price: 5000 USD
Availability: InStock

Custom FRP Tube Pultrusion Die for Pultrusion Machine

This high-precision FRP Tube Pultrusion Mold delivers stable dimension, low wear, and long service life, ideal for industrial GFRP pultruded tube mass production.

Parameter Item	Core Specification
Mold Material	H13 hot work tool steel, fully heat treated
Surface Hardness	HRC 58-62, high wear resistance
Cavity Tolerance	±0.02mm, ensures consistent FRP tube dimension
Standard Tube Size Range	Round φ10-76mm, Square 10-100mm
Heating System	Integrated cartridge heaters with K-type thermocouples
Surface Treatment	Polished to Ra ≤ 0.8μm, smooth demolding
Custom Service	Supports non-standard FRP tube profile customization

Product categories

Contact Our Team

Get professional support for pultrusion equipment, dies, and profiles

Detailed Introduction to FRP Tube Molds

TOLIKE ‌FRP Tube Pultrusion Mold‌ is engineered for continuous pultrusion lines, delivering steady forming accuracy for both round and square fiberglass hollow profiles. Unlike common generic dies, this mold adopts a one-piece precision cavity structure, which effectively eliminates profile warping, surface burrs and dimension deviation during long-time high-speed pulling. It works seamlessly with our matched ‌FRP Pultruded Square Tube‌ and ‌FRP Pultruded Round Tube‌ production processes, helping fabricators maintain consistent product quality across every production batch. This high-performance GFRP tube pultrusion die is manufactured from heat-treated hot work tool steel, with the inner cavity polished to ultra-low roughness. Its optimized heating zone layout ensures uniform resin curing across the entire profile section, drastically reducing mold cleaning frequency and lowering unplanned downtime. For industrial buyers, this directly translates to higher line output, less material waste and lower long-term operating cost compared with standard pultrusion tooling. For custom profile projects, TOLIKE FRP pultrusion tube mold can be adjusted according to special section requirements, supporting non-standard fiberglass pipe dimensions and wall thickness customization. It is a reliable long-life tooling choice for manufacturers who need to stably supply structural, insulating or corrosion-resistant FRP tubular products to downstream construction, energy and infrastructure markets.

Pultrusion Dies and Preforming for FRP Square Tubes

Advantages of Our FRP Tube Pultrusion Die

Precision cavity tolerance ≤ ±0.02mm, keeps FRP pultruded tube consistent in dimension across thousands of production meters.
Full H13 hot work tool steel body with HRC 58-62 hardness, delivers extra-long service life under continuous high-load pultrusion operation.
Ultra-smooth inner cavity surface (Ra ≤ 0.8μm) enables easy demolding, reduces profile surface defects and cuts post-processing workload.
Optimized multi-zone heating design ensures uniform resin curing, lowers scrap rate and improves overall pultrusion line efficiency.
Supports both standard round/square FRP tube sizes and fully custom non-standard profile dimensions, adapts to diverse project requirements.
TOLIKE provides complete mold trial, parameter adjustment and after-sales technical guidance, helping buyers shorten new product launch cycle.
Modular split structure design allows quick cavity replacement, users can switch between different FRP tube specifications without full mold disassembly.
Hardened cavity surface treatment effectively resists glass fiber abrasion, extends mold service life by over 30% compared to ordinary carbon steel molds.
Matched with pre-calibrated heating elements and thermocouple positions, no repeated debugging is needed after installation, directly cuts initial setup time.
Strict factory pre-testing before delivery ensures the mold runs stably with most mainstream pultrusion machines on the market.

Grinding the inner cavity of the FRP tube pultrusion die

Parameters for GFRP Tube Pultrusion Mold

Parameter	Specification	Buyer Value
Mold Material	H13 hot work tool steel, vacuum heat treated	High-temperature stability, safe for long continuous pultrusion
Cavity Hardness	HRC 58-62	Withstands glass fiber abrasion, extends tooling life
Cavity Tolerance	±0.02mm	Consistent FRP tube dimension, fewer rejects
Inner Surface Roughness	Ra ≤ 0.8μm, mirror polished	Smooth demolding, defect-free profile surface
Standard Round Tube Range	φ10-76mm	Covers most common FRP round tube sizes
Standard Square Tube Range	10×10-100×100mm	Ready for mainstream square profile orders
Heating System	Multi-zone cartridge heaters with K-type thermocouples	Uniform resin curing, stable production line speed
Working Temperature	Up to 200℃, adjustable	Compatible with common polyester and vinyl ester resins
Production Line Speed	Matched up to 0.3-1.2 m/min	Supports medium to high output pultrusion lines
Service Life	1,000,000+ m pulling (typical)	Lower cost per meter, better long-term ROI
Customization	Non-standard section, wall thickness and length	Fits special project and OEM requirements
Delivery & Support	Pre-tested before shipment, mold trial plus technical guidance	Shorter commissioning and new product launch cycle

Polishing of the inner cavity of the FRP tube pultrusion die

Manufacturing Process of FRP Tube Pultrusion Die

Manufacturing Process of FRP Tube Pultrusion Mold starts with strict material selection and precision CNC machining, which defines the final forming accuracy and long service life of the FRP pultrusion tube die. Every TOLIKE FRP tube pultrusion mold is based on high-quality hot work tool steel blank, and all raw materials will go through incoming inspection to ensure no internal crack or impurity before formal processing. This step lays a solid foundation for the high wear resistance and high temperature stability required by long-term continuous pultrusion production.

After blank preparation, the core cavity of the fiberglass tube pultrusion mold is processed through multi-axis CNC milling and high-precision grinding. For round and square FRP tubular profiles, the inner cavity geometric accuracy is strictly controlled within ±0.02mm, and the flow channel transition is optimized to avoid resin retention and uneven curing during pultrusion. This process also ensures the inner wall of the GFRP pipe pultrusion die obtains a uniform and smooth base, which is a key prerequisite for subsequent polishing and easy demolding performance.

Then the FRP pultrusion die enters vacuum heat treatment and fine surface treatment. After high-temperature quenching and tempering, the overall hardness of the mold cavity reaches HRC 58-62, which greatly improves the ability to resist continuous friction from glass fiber roving and resin. The inner cavity is then manually polished step by step to mirror effect, making the surface roughness lower than Ra 0.8μm, effectively reducing profile surface burrs, fiber fuzzing and demolding resistance in mass production.

Manufacturing Process for Pultrusion Dies:

Available Section Shapes and Corresponding Profile Applications

TOLIKE FRP Tube Pultrusion Die supports a wide range of customizable hollow section profiles, covering almost all mainstream FRP tubular shapes required by industrial pultrusion lines. The most standard configurations include solid round tube, hollow round tube, square tube and rectangular tube, which are the most in-demand fiberglass profiles for general structural and insulating applications. Beyond these basic shapes, the FRP pultrusion tube mold can also be designed for special sections such as elliptical tube, D-shaped tube, multi-lumen hollow tube and grooved inner wall tube, to meet non-standard engineering requirements that ordinary profile tooling cannot cover.

These different shapes of FRP profiles produced by the fiberglass tube pultrusion die have formed highly targeted application scenarios in multiple downstream industries. Round FRP pultruded tubes are widely used for electric power insulation rods, telecom antenna support poles, fence posts and cable protection ducts, leveraging their uniform circumferential strength and excellent bending resistance. Square and rectangular FRP tubes are more favored in construction structural frames, walkway handrails, sewage tank purlins and equipment support frames, as their flat sides make installation and connection much easier without additional anti-rotation treatment.

For those special sections produced by custom GFRP pipe pultrusion mold, their application value is even more irreplaceable. Multi-lumen FRP tubes are often used in electrical equipment that needs to run multiple insulating wires inside one profile, while D-shaped and elliptical profiles are very common in tool handles, agricultural equipment components and transportation vehicle lightweight structural parts. This high shape flexibility makes TOLIKE FRP tube pultrusion die a very cost-effective tooling choice for industrial buyers who need to develop diversified composite profile products for different market segments.

FAQ — FRP Tube Pultrusion Mold

Our standard FRP pultrusion tube mold covers round, square and rectangular hollow profiles, with size range from φ10mm to φ76mm for round tubes and 10mm to 100mm for square tubes. Custom shapes like elliptical, multi-lumen and D-shaped FRP tubular profiles are also available.

Made of fully heat-treated H13 hot work tool steel with HRC 58-62 hardness, our standard GFRP pipe pultrusion die can reach a typical service life of over 1,000,000 continuous pulling meters under normal operating conditions.

Yes. Our FRP tube pultrusion die is pre-calibrated with standard heating zone layout and installation dimensions, which is fully compatible with most mainstream continuous pultrusion lines on the market, no major modification is needed after installation.

The inner cavity of our FRP pultrusion tube mold is controlled within ±0.02mm machining tolerance, which ensures the finished FRP pultruded tube can maintain consistent dimension accuracy across thousands of production meters.

Yes. TOLIKE provides complete mold trial guidance, process parameter recommendation and after-sales technical support, helping you quickly finish line commissioning and start stable mass production.

Absolutely. We can design and manufacture custom fiberglass tube pultrusion dies according to your specific section drawing, wall thickness and dimension requirements, to match your unique product development needs.

Standard option is mirror polishing to Ra ≤ 0.8μm for smooth demolding. For high-abrasion carbon fiber or special resin profiles, we also offer hard chrome plating, DLC or tungsten carbide coating to extend die service life by 3-5x.