● Compression moulding · SMC · CSMC · Phenolic

Advanced engineering
in compression molding

We transform thermoset resins into high-precision structural components for the most demanding sectors: rail, automotive, energy and technical construction.

25+
Years of experience
1.250Tn
Largest press
HL3
Phenolic SMC · EN 45545 fire
5.500m²
Industrial floor area
7
Prensas de compresión
35mm
Max. sheet thickness
4000×2000
Water jet cutting (mm)
±64°
Head tilt
24Tn
Mold capacity
High-performance materials

Lighter than aluminium. Safer in a fire.

Two high-value materials for demanding projects, processed with the same industrial capacity as our SMC series.

Carbon fibre CSMC material
CSMC · Carbon fibre

Structural parts lighter than in aluminium

1,51g/cm³ density
≥ 370MPa tensile strength
+113%specific strength vs. 6061-T6 aluminium

Carbon fibre with the productivity of compression moulding: ribs and bosses in a single part, no corrosion, and repeatable series.

Fire-retardant phenolic SMC material
Phenolic SMC · EN 45545-2

Railway interiors with the highest fire requirements

HL3EN 45545-2, certified configuration
3Dshaped parts, not just panels
5 axiswaterjet cutting and CNC in-house

Fire behaviour comes from the phenolic resin itself: it chars instead of dripping and produces little smoke.

Railway volumes? We also work with flame-retardant polyester SMC classified to EN 45545-2 for R1, R2, R3, R6, R7 and R17 up to HL3. See EN 45545-2 materials →

View all materials →

Infrastructure

Centralized facilities for continuous large-format flow.

Single plant in Arrigorriaga, designed for handling large-format components and agile international shipping — 20 min from Bilbao Airport and 25 min from the Port of Bilbao.

Composites Martiartu warehouse and logistics building
5.500 m²
Industrial floor area
+1.000
Packing capacity
  • Dedicated mold warehouse for maximum protection and tooling lifespan.
  • Capacity for molds up to 24 tonnes.
  • High-capacity overhead cranes (2×10T, 1×5T) and 2 fast-loading docks.
✈ 20 min from Bilbao Airport ⚓ 25 min from the Port of Bilbao

View full capability →

Press fleet

Massive infrastructure for high structural density.

1,250 t Dieffenbacher compression press
Crown Jewel
1.250 Tn
P10 // Platen: 3500 × 1800 mm
PrensaRated forcePlaten dimensions
P1012.500 KN3500 × 1800 mm
P810.000 KN2800 × 1800 mm
P306.000 KN1850 × 1400 mm
P76.000 KN1600 × 1400 mm
P224.000 KN1000 × 1000 mm
P202.500 KN800 × 800 mm
P41.500 KN450 × 900 mm
Series production for manufacturers

Capacity for the series of electrical equipment and rolling stock manufacturers.

When volume drives the project, what matters is output rate, part-to-part repeatability and parts that arrive ready to fit.

7 presses from 150 to 1,250 t, moulds up to 24 t, unit traceability and shipping 25 min from the Port of Bilbao.

Plan a series →
Plant map

Explore our 5,500 m² plant by zone.

Illustrative diagram of the plant layout — not a scaled architectural drawing. Click each zone to see the real photo and specifications.

Precision finishing

From mold to finished part, with no external intermediaries.

5-axis waterjet cutting head

〰 5-axis water jet cutting

0°–64°

2 máquinas propias. Corte sin deformación térmica hasta 200mm. Dimensiones útiles de trabajo hasta 4000×2000mm.

In-mould painting robot (PIMC)

◐ PIMC painting

Robotic in-mold painting for direct Class A finish, with full control of color and coat thickness.

CNC machining centre

⚙ CNC machining

In-house workshop with 4 high-speed machining centers, dedicated to facing, drilling, calibrating and dimensional finishing.

Estimador de proyecto

From specification to quote in minutes, not days.

Define material, geometría, tolerancias y volumen. Nuestro sistema calcula un rango de precio orientativo al instante; nuestro equipo confirma la viabilidad inicial en menos de 24h laborables, y la oferta técnica completa según la complejidad del proyecto.

1Material — SMC, CSMC, HL3 fire-retardant phenolic
2Dimensions, thickness (up to 35mm) and finish
3Batch volume and lead time
4Upload technical drawing — CAD, STEP, DWG
MaterialCSMC · Carbon
Dimensions1200 × 800 × 6 mm
CertificationEN 45545 HL3
Batch500 pcs
Estimated lead time4–5 weeks
Indicative estimate18.400 – 21.200 €
Smart Factory

Full traceability, real-time monitoring.

Our production lines operate under strict analytical control. Sensor monitoring of critical variables on the presses helps ensure repeatability across long runs.

  • Hot thermosensors: continuous monitoring of temperature and hydraulic pressure curves in the presses.
  • Full unit traceability: strict record linking raw material batch, press and final part.
Smart Factory OEE Monitor
● Online
7
Sensor-equipped presses
Active
Press fleet status
Analytical Cycle Capture
Application sectors

One material, very different regulatory demands.

View all sectors →

Application cases

The kind of projects we solve regularly.

Illustrative examples of the kind of technical and commercial challenge we take on — they don't correspond to a specific identifiable client.

Production capacity

Long runs without compromising lead times

Challenge: a manufacturer with several of its own molds couldn't get its molding supplier to handle long runs at the pace it needed.

Solution: we redistributed production across our press lines by tonnage and cycle time for each mold, freeing up capacity for larger batches.

Result: long runs covered reliably, with predictable lead times.

Part cost

From manual molding to a cost-effective mold

Challenge: a part was being manufactured by manual molding, with high labor costs and low repeatability between units.

Solution: we proposed a cost-contained compression mold, sized for the customer's actual volume.

Result: a reduction of -53% in the unit price of the part.

Material change

Lightweighting via compression molding

Challenge: a part made in another material and process was heavy and penalized logistics and assembly costs.

Solution: redesign for compression molding in SMC/CSMC, adjusting thicknesses and reinforcements for the new material.

Result: a lighter part and a lower final price.

Exclusive capability

In-house mold for large-format sheets.

We are one of the few processors with genuine in-house mold capability, for both large-format sheets and custom sizes, reaching thicknesses of up to 35 mm. Maximum structural solidity, made to measure.

ISO 9001:2015
Quality Assurance
ISO 14001:2015
Environmental Management
Pallet of packed SMC sheets ready for shipping
Corporate presentation

Get to know Composites Martiartu in detail.

Facilities, press fleet, materials, certifications and sector application cases, in an interactive bilingual presentation. Access on request: we review it and send you the link.

Request access →
Technical shop

SMC sheets to order. Company registration, instant pricing.

Direct purchase of polyester or carbon sheets with cutting and machining to drawing. Once your company is registered, prices are visible. For customization or large quantities, request an RFQ.

SMC mounting plate inside an electrical switchboard
SMC · 18% glass fiber

Standard mounting sheet

General use, electrical insulation. Thicknesses from 2 to 35mm to order.

Price for registered companiesView options →
Carbon fibre CSMC sheet
CSMC · Carbon fiber

High-performance carbon sheet

Specific strength 113% higher than 6061-T6 aluminium, according to the material datasheet. Stiffness and lightness for critical applications.

Phenolic SMC sheet
SMC Phenolic · Fire-retardant

Phenolic sheet EN 45545-2 HL3

Meets the applicable EN 45545-2 requirements at HL3 for the certified configuration. Fire behaviour inherent to phenolic resin.

24/7 Technical assistant

Check datasheets and regulations without waiting for an engineer.

The assistant knows material specifications, process tolerances, plant capability and certifications. It replies in seconds and hands off to our technical team when needed.

Every assistant response must be verified with our technical team and the material datasheet before making design or purchasing decisions.

TECHNICAL ASSISTANT · MARTIARTU
Does your phenolic comply with EN 45545 HL3 for train interiors?
Sí — nuestro SMC fenólico cumple los requisitos aplicables de EN 45545-2, categoría HL3, para la configuración certificada. ¿Necesitas la ficha técnica completa o un RFQ para una pieza concreta?
RFQ for a 1200×800×6mm panel, batch of 500.
Perfecto, te abro el estimador de proyecto con estos datos precargados →

Have a drawing and a deadline?

Envíanos tu solicitud de ingeniería. Respondemos con la viabilidad técnica inicial en menos de 24h laborables; la oferta completa depende de la complejidad del proyecto.