Máquina de Espumagem Secundária EPP (Linha de Re-Expansão) - fabricante de máquinas EPS China

SPEPP-2F

CE ISO 9001

Máquina de Espumagem Secundária EPP (Linha de Re-Expansão)

Name: Máquina de Espumagem Secundária EPP (Linha de Re-Expansão)
Brand: ChinaEps
Availability: PreOrder

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Máquina de Espumagem Secundária EPP (Linha de Re-Expansão) — epp secondary foaming by ChinaEps, CE & ISO 9001 certified.

Fabricamos linha de espumação secundária EPP (re-expansão) — densifica pérolas EPP pré-expandidas até especificação final 30-200 g/L. Certificado CE, 60+ países.

Especificações Principais

Model

SPEPP-2F EPP Secondary Foaming Machine

Target Material

EPP (Expanded Polypropylene) beads

Barrel Diameter

1,400 mm

Batch Capacity

500-700 kg/h

Certificado CE e ISO 9001 Garantia Estrutural 5 Anos Resposta Técnica em 24h

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Inside the Machine — Core Components

Eight engineered subsystems that make this machine production-grade. Each component is sourced, built, and tested for industrial duty cycles.

1. Foaming Chamber (Vertical Pressure Vessel + Top-Mounted Agitator)

Function

Vertical pressure vessel where the second steam-foaming pass takes place. Top-mounted variable-speed agitator keeps beads in suspension during the 30-120 second cycle for uniform cell expansion. Insulated chamber body minimizes thermal loss between batches.

Engineering Details

Stainless steel SS304 / SS316L pressure vessel rated to 0.5 MPa (5x working pressure safety margin). Chamber volume 0.3-1.0 m3 (SM Edition) / 1.5-3.0 m3 (RP Edition). Top-mounted SEW or Bonfiglioli geared motor 1.5-4 kW with VFD speed control 30-120 rpm. Insulated body with rock-wool 50 mm + stainless cladding. CE / PED certified pressure vessel design.

2. Steam System (Supply Manifold + Distribution Network + Condensate Return)

Function

Stainless steel steam manifold delivers regulated steam pressure 0.05-0.15 MPa to the foaming chamber. Integrated condensate return line recovers water and reduces boiler load — typical 15-25 percent steam savings vs single-line discharge designs.

Engineering Details

DN50-DN80 stainless steel 304 piping with TIG-welded joints (no threaded connections at high temperature). ARI or Spirax-Sarco steam control valves with pneumatic actuators. Watson-Marlow or Festo solenoid valves on branch lines for batch-level steam isolation. Steam trap network on condensate return for cyclic discharge. Pre-insulated pipework with aluminum cladding for surface temperature less than 60 degC.

3. Pressure Control (Dual Gauge + Safety Relief Valve)

Function

Dual analog pressure gauges (independent primary + secondary) provide redundant pressure monitoring on the foaming chamber. Pneumatic safety relief valve discharges at 0.18 MPa preventing over-pressure events — critical for EPP processing where over-foaming damages bead structure.

Engineering Details

WIKA or Ashcroft analog gauges 0-0.25 MPa range with plus-minus 1.6 percent accuracy. Schneider / Honeywell electronic pressure transmitter (4-20 mA output to PLC) for digital recording + alarm setpoints. Pneumatic safety relief valve PSV 1/2 inch set to 0.18 MPa per ASME Section VIII. Pressure decay test interval 12 months per CE certification requirements.

4. Weighing / Feeding Unit (Gravimetric Hopper + Sealed Transfer)

Function

Stainless steel weighing hopper meters pre-expanded EPP beads into the foaming chamber with plus-minus 0.5 percent gravimetric accuracy per batch. Sealed pneumatic transfer prevents bead loss and maintains negative-pressure conveying integrity.

Engineering Details

Stainless steel SS304 hopper 100-500 liters with conical bottom 60-degree slope for free flow. Mettler Toledo or A&D load cells (3-4 cells per hopper) with summing junction box, accuracy plus-minus 0.5 percent of batch weight. Inflatable seal on discharge gate (compressed air 0.3-0.6 MPa) prevents bead leakage. Photoelectric level sensor triggers refill alarm.

5. Discharge System (Depressurization + Pneumatic Transfer to Aging Silo)

Function

Re-expanded beads exit the foaming chamber through a depressurization chamber, then pneumatic-conveyed to the downstream aging silo or directly to SM-1200 shape molding line (SM Edition). Pipe outlet with isolation valve enables independent batch processing.

Engineering Details

Stainless steel discharge chamber with butterfly valve (DN150) controlled by pneumatic actuator + PLC. Pressure equalization vent line returns excess steam back to manifold (reduces emission + recovers heat). Optional rotary airlock valve for continuous discharge (RP Edition). Pneumatic conveyor pipe DN100 mm 304 stainless steel with long-radius elbows (R/D greater than 1.5) to minimize bead damage.

6. PLC Control Panel (Siemens + Weintek HMI + Recipe Library)

Function

Independent control cabinet orchestrates the full batch cycle — feed weight, steam timing, pressure setpoint, agitator speed, cycle duration, and discharge sequence. Operator sets recipe by target density; PLC handles the rest with full traceability per ISO 9001.

Engineering Details

Siemens S7-1200 PLC + 10-inch Weintek HMI touch screen with multi-language interface (EN/ES/CN/RU). Status indicator lamps: green (run) / red (fault) / amber (standby). Alarm + interlock system per EN 60204-1 (e-stop / safety relay / light curtain). Recipe library 100+ slots indexed by bead grade, target density, customer batch ID. Ethernet/IP integration with upstream aging silo + downstream SM-1200 shape molding line for fully integrated EPP plants.

Especificações Técnicas

2 models

Parâmetro	SPEPP-2F-RP (Raw Producer Edition)	SPEPP-2F-SM (Shape Molder Edition)
Target Customer	EPP raw material producers (sell beads to downstream factories)	EPP shape-molding factories (own product manufacturing)
Configuration	3-batch parallel re-expansion line (visible in product photo)	1-batch compact re-expansion unit (right-sized for in-house density tuning)
Production Output	80-300 kg/hour (depending on target density)	20-80 kg/hour (just-in-time per molding order)
Bead Density Output	18-50 g/L (multi-grade inventory production)	18-50 g/L (adjustable per recipe)
Steam Pressure	0.05-0.15 MPa	0.05-0.15 MPa
Steam Consumption	0.4-0.6 kg steam per kg EPP	0.3-0.4 kg steam per kg EPP (lower per-batch overhead)
Compressed Air	1-3 bar (gas absorption stage)	1-3 bar (gas absorption stage)
Cycle Time	30-120 seconds per batch	30-90 seconds per batch (smaller batch faster)
Aging Tank Capacity	3 tanks x 0.5-1.0 m3 each	1 tank x 0.3-0.5 m3
Discharge Mode	Pneumatic transfer to aging silo + bagging line	Direct feed to SM-1200 shape molding line (just-in-time)
Control System	Siemens PLC + recipe library for multi-density production runs	Siemens PLC + integration with downstream SM-1200 PLC
Power	40-65 kW total installed	15-25 kW total installed
Floor Area Required	200-400 m2	60-100 m2

* As especificações estão sujeitas a alterações sem aviso prévio. Entre em contato para obter os dados técnicos mais recentes.

O Que Esta Máquina Resolve

Três problemas de produção eliminados por esta máquina — com soluções engenheiradas e mensuráveis.

O Problema 1

Raw material producers need to convert first-expanded EPP beads (50-100 g/L) into target market densities (18-50 g/L) for sale to downstream shape-molding factories — but single-stage expansion physics cannot reach low density without compromising bead structure.

Como Esta Máquina Resolve

SOLUTION FOR RAW MATERIAL PRODUCERS — complete 3-batch parallel re-expansion line: aging tank + pressurized gas absorption + steam foaming + cooling. Configurable density output 18-50 g/L with 1.2-2.5x ratio. Produces sellable EPP bead inventory at 80-300 kg/hour.

O Problema 2

EPP shape-molding factories receive raw beads at fixed density from suppliers — but their product mix requires varied densities (e.g. 25 g/L for cushioning, 45 g/L for structural parts). Buying separate density grades from multiple suppliers is expensive and inventory-heavy.

Como Esta Máquina Resolve

SOLUTION FOR EPP SHAPE-MOLDING FACTORIES — single density input + in-house re-expansion = output multiple target densities on demand. Reduces raw material SKUs by 60-70 percent. Pairs directly with SM-1200 shape molding line for just-in-time density tuning per production order.

Princípio de Funcionamento

SPEPP-2F runs the mandatory second foaming pass that distinguishes EPP processing from EPS — first-expanded EPP beads are pressurized, then steam-foamed under counter-pressure to reach target density 18-50 g/L with uniform cell structure.

Step 1

1. Aging Tank Loading

First-expanded EPP beads (50-100 g/L) load into pressurized aging tank for 4-24 hours conditioning at 1-3 bar gas pressure to absorb internal gas.

Step 2

2. Pressurized Gas Absorption

Compressed air or CO2 (1-3 bar) saturates the bead interior — this gas charge powers the second expansion when heated.

Step 3

3. Secondary Steam Foaming

Charged beads transfer to foaming vessel — steam 0.05-0.15 MPa at 100-120°C combined with counter-pressure expands beads 1.2-2.5x for 30-120 seconds.

Step 4

4. Cooling and Drying

Expanded beads cool immediately via vacuum or air cooling to lock cell structure, then dry to remove condensate moisture below 1 percent.

Step 5

5. Discharge to Downstream

Re-expanded EPP beads at target density 18-50 g/L discharge to aging silo for the molding line or directly to shape molding machine.

Vantagens de Desempenho Engenheiradas

Cada vantagem respaldada por especificações mensuráveis — sem alegações de marketing sem dados.

Re-Expansion Ratio

1.2-2.5x

vs Single-stage EPS = 1x

Second foaming reduces density 30-60 percent vs first expansion alone — required by EPP physics.

Target Bead Density

18-50 g/L

vs First-stage EPP = 50-100 g/L

Achieves the ultra-low density range demanded by automotive bumper cores and high-end packaging.

Steam Pressure Range

0.05-0.15 MPa

vs EPS pre-expander = 0.05-0.10 MPa

Higher steam pressure than EPS pre-expansion accommodates EPP polypropylene melting point and re-expansion physics.

Production Output

80-300 kg/h

vs Per line, depending on density

Configurable 3-batch parallel line design (visible in product photo) enables continuous output for high-volume EPP shape molders.

Cycle Time

30-120 seconds

vs Per batch (excluding aging time)

Programmable per recipe — short cycle 30s for ultra-low density, longer cycle 120s for premium cell structure parts.

Aplicações Reais de Produção

Veja onde esta máquina se encaixa em fábricas reais.

Yoga foam roller and exercise foam tube (EPP density 30-45 g/L for compression resilience)

EPP foam model airplane and RC glider — lightweight, crash-resistant, shape-molded fuselage

EPP shape-molded pipe fittings and HVAC duct components (heat-stable to 130°C)

Large-format EPP building blocks for children playground and indoor play centers

EPP food-delivery cold-storage box (reusable, washable, insulation Δ < 4°C/8h)

Modular EPP storage cabinets and organizer cubes (multi-color, stackable shape-molded)

Build a Complete EPS / EPP Line

This machine integrates into the full ChinaEps production flow — upstream, downstream, and auxiliary equipment from one supplier.

Upstream — Bead Preparation

Raw EPP Beads

Primary-foamed EPP beads from JSP, Kaneka, BASF, or Asian partner producers. ChinaEps sources via approved automotive-grade suppliers.

High-Pressure Steam Boiler (1+ ton/h)

Required for EPP's elevated steam pressure. ChinaEps quotes complete boiler package matched to SPEPP-2F.

Downstream — Finishing & Packing

EPP Shape Molding Machine

Forms EPP beads into final automotive bumper cores, sporting goods, packaging shapes. Required downstream of SPEPP-2F.

Premium Aging Silos

Fluidized aging silos for 24-72h moisture stabilization between SPEPP-2F and shape molding.

Auxiliary Systems

IATF 16949 QA Documentation

Documentation package supporting customer's IATF 16949 automotive quality system certification.

Resumo de ROI

Números de referência rápidos — para uma cotação precisa com os dados da sua fábrica, use a Calculadora de ROI.

Investimento em Equipamento

~$1,400-1,600/ton FOB illustrative (quote-specific)

Período de Retorno (Payback)

14-18 months at 500-700 kg/h EPP production for automotive Tier-1 customer

Capacidade

500-700 kg/h continuous batch; 4-5 t/day single-shift; 10-12 t/day double-shift

Executar Calculadora Detalhada de ROI →

Product FAQ

The questions buyers ask most often before placing an order.

Why can't I use my existing EPS pre-expander for EPP?

Two physical reasons. (1) Steam pressure: EPP needs 0.5-0.8 MPa, EPS pre-expanders are rated for 0.18-0.25 MPa — running at higher pressure exceeds the pressure vessel certification and risks rupture. (2) Agitator: EPP has higher viscosity during expansion, EPS agitators are sized for lower torque — running EPP destroys agitator seals within months.

Does SPEPP-2F also work for EPS?

Yes — backward compatible, just run at lower steam pressure (0.18-0.25 MPa range). But it's overkill for EPS-only production — EPS pre-expanders are 30-40% cheaper.

What automotive certifications does SPEPP-2F support?

IATF 16949 compatible (automotive supplier quality system). The machine itself is CE + ISO 9001 certified; your factory needs to add IATF 16949 process certification separately. We provide documentation supporting IATF audits.

Steam boiler requirement?

Minimum 1.0 ton/h at 1.0 MPa working pressure. Higher boiler spec than EPS due to EPP's elevated steam requirements.

Ships to 220V/60Hz?

Yes — factory build option. 3-week lead time adjustment for the larger motor sourcing.

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