BM30/50/100 Blow Molding Machine

Thanks to maximum product volumes of 30L, 50L, and 100L respectively, the BM series covers a wide range of industrial and consumer blow-molded products.
BM30 – Suitable for compact, high-mix production
20L–30L chemical drums (lubricants, coolants, agrochemicals)
5–10L automotive reservoirs (windshield washer tanks, expansion tanks)
Sports equipment (small kayak pontoons, rescue floats)
Real case: A Portuguese packaging company replaced an old reciprocating screw machine with the BM30 (main motor 37kW, accumulator 5.2L). They now produce 28L HDPE square drums at 120 pcs/hour, weight deviation ±1.5g, scrap rate reduced from 5% to 1.2%.
BM50 – Workhorse for 30L–50L containers
30L–50L industrial drums (oils, adhesives, food ingredients)
Large automotive air ducts and intake pipes (up to 50L volume)
Household waste bins (40L/60L)
Two screw options (80mm or 90mm), plasticizing capacity (PE) 150–200 kg/h. 400kN clamping force and 700×700 mm maximum mold size allow BM50 to easily accommodate large, complex molds.
Real case: A Turkish automotive Tier 1 supplier uses two BM50 machines (90mm screw, servo pump 21kW) to produce 45L air ducts for bus air conditioning systems. Cycle time 85 seconds, energy saving 32% compared to previous fixed displacement pump machines.
BM100 – Two-layer capable model for high-value parts
80L–100L industrial containers (chemicals, bulk food)
Two-layer products (outer colored layer + inner virgin/barrier layer)
Large industrial parts (RV water tanks, road safety barriers)
BM100 offers either a single 100mm screw (240 kg/h PE) or twin 70mm screws (200 kg/h) for better mixing. Its two-layer option is popular for food contact or UV-resistant containers without the need for post-lining.
Real case: A Polish chemical company switched from single-layer 100L drums to two-layer BM100 (outer recycled HDPE + inner virgin HDPE). They saved 18% material costs while passing hazardous goods UN certification.

Servo-hydraulic system – measurable energy savings
All models use servo-driven oil pump motors (21–22 kW). Unlike traditional fixed displacement pumps, servo pressure and flow are matched on demand.
Energy consumption reduction: 30–50% lower kWh per kg output
Oil temperature: 10–15°C lower, extending seal life
Noise level: below 78 dB(A) at full speed

Accumulator head – better for large shot volumes
Accumulators (5.2L for BM30, 6.6L for BM50, 12L for BM100) store molten plastic and inject rapidly.
No flow marks on large surfaces
Reduced parison sag – critical for 30-100L parts
Multi-layer capability without separate co-extrusion head (BM100 two-layer)

High clamping force & large platens
BM30: 280 kN clamping force, 740×740 mm platens – suitable for molds up to 550×650 mm
BM50: 400 kN clamping force, 900×900 mm platens – suitable for molds up to 700×700 mm
BM100: 600 kN clamping force, 1100×1100 mm platens – suitable for molds up to 900×900 mm
Wide opening stroke ranges (BM30: 400-900 mm, BM50: 450-1250 mm, BM100: 500-1300 mm) allow tall part production and easy insert placement.

Flexible screw configurations
BM50: Choose 80mm (150 kg/h) for thick-walled parts, or 90mm (200 kg/h) for thin-wall high output
BM100: 100/25 or 100/30 mm screw – longer L/D (30:1) provides better homogenization for filled or recycled materials

Compact footprint – space saving even for large capacity models
Despite large mold space, overall machine dimensions are moderate:
BM30: 4.3×2.2×3.5 m
BM50: 6.7×3.5×4.0 mBM100: 5.5×3.5×4.0 m (width includes two-layer attachments)

We implement a four-stage quality system, following ISO 9001:2015 and ISO 20430 (blow molding machine safety and performance).

Stage 1 – Incoming parts & assembly inspection
Screw & barrel: 100% hardness test (HRC 55-60) and surface roughness (Ra ≤ 0.4 µm)
Hydraulic system: All hoses and valves pressure tested at 1.5× working pressure (up to 210 bar)
Accumulator head: Leak test with high-viscosity HDPE at 200°C – pressure drop ≤0.1% over 10 minutes

Stage 2 – Dry cycle & no-load operation
Clamp parallelism verified with laser sensors (≤0.1 mm/m)
Servo response time: from 0 to max pressure ≤80 ms
Screw speed accuracy: ±2 rpm at full load

Stage 3 – Process capability test (with actual mold)
Each machine runs continuously for 8 hours using customer's specified product (or our standard 30L square drum) before shipment. Recorded data:
Shot weight consistency: Cpk ≥ 1.33 over 30 consecutive cycles
Wall thickness distribution: 6-point ultrasonic scan – deviation ≤0.25 mm
Leak test: Product pressurized to 0.3 bar (30L/50L) or 0.2 bar (100L) for 30 seconds – no bubbles
Energy monitoring: kWh per kg product calculated via integrated meter

Stage 4 – QC in mass production (for end users)
We provide standard QC procedures for customers:
Every hour: Check flash thickness and part weight (target ±2%)
Per shift: Burst test – take one part, seal all openings, pressurize to failure. Minimum burst pressure for 50L HDPE: 8 bar.
Per material lot: MFI test (190°C/2.16kg) – must be within ±5% of nominal value.
Non-destructive testing (optional): Ultrasonic wall thickness gauge (accuracy ±0.05 mm) for critical parts like fuel tanks.
Example from Polish customer: Using BM100 two-layer machine, they run an inline vision system to detect black spots or delamination. Over 14 months of three-shift production, no non-conforming batches were shipped to their automotive customer.

Q1 – Can the BM50 produce two-layer or three-layer products?
The standard BM50 is a single-layer machine. However, we can provide an optional co-extrusion adapter to add a second layer (e.g., colored layer + virgin). For dedicated two-layer production with higher output, the BM100 two-layer model is recommended – it has two independent screws (70×2 or 100/25) and a dedicated accumulator head with layer ratio control.

Q2 – What is the typical energy consumption per kg of product?
Based on HDPE field data:
BM30: 0.55-0.65 kWh/kg
BM50 (90mm screw): 0.50-0.60 kWh/kg
BM100 (single screw): 0.48-0.58 kWh/kg
Energy savings mainly come from the servo pump. Compared to a traditional 55kW fixed displacement pump machine, the BM50 saves approximately 18,000 kWh per year (6,000 operating hours).

Q3 – How long does color or material changeover take?
Color change (similar materials): 20-30 minutes – flush with 2-3 shots of new material through the accumulator head.
Material change (e.g., PE to PP): 45-60 minutes – screw removal and barrel cleaning recommended for the first change; afterwards, using hot cleaning compound reduces time to 35 minutes.

Q4 – What are the maximum mold dimensions and weight supported by the clamping unit?

Heavier molds can be used if moving platen speed is reduced (consult our engineers).

Q5 – Which materials are compatible?
Standard: HDPE, LDPE, LLDPE, PP (homopolymer and copolymer)
With minor screw modifications: PVC (rigid and flexible), PA6/PA66, PETG, EVA, TPE
Barrier materials (for two-layer BM100): EVOH, recycled HDPE (up to 60% regrind in inner layer)
For filled materials (talc, glass fiber), a higher L/D (30:1) screw is recommended to avoid unmelted particles.

Q6 – How often does the accumulator head require maintenance?
Under normal two-shift operation (4,000 hours/year):
Check ring and plunger seals: inspect every 3,000 hours – typical life 8,000-10,000 hours
Hydraulic oil change: every 6,000 hours (or every 18 months), use ISO VG 46
Servo motor bearings: grease every 4,000 hours – no replacement needed before 20,000 hours
We provide a complete maintenance log sheet with each machine.

Q7 – Can the BM50 be equipped with a robotic part removal system?
Yes. The BM50 comes with a spare I/O board (24V PNP) for connecting pick-and-place or 3-axis robots. The servo pump can supply additional flow (up to 15 L/min) for external grippers. Many customers combine the BM50 with deflashing and conveyor systems to form fully automated cells.