Step 1 — Preheat (Manual)

Operator loads preforms into infrared oven unit and heats to target stretch temperature.

Step 2 — Load (Manual)

Operator places heated preforms neck-up into the blow station — one per cavity.

Step 3 — Clamp (Auto)

Machine closes mold halves around all preforms simultaneously. Operator steps back.

Step 4 — Stretch & Blow (Auto)

Servo stretch rods extend axially; pre-blow at 7 kg/cm² then high-pressure blow at 30 kg/cm² drives PET against cooled mold wall.

Step 5 — Cool & Open (Auto)

Mold-wall cooling solidifies bottle geometry. Machine opens mold and signals operator for unloading.

Step 6 — Unload (Manual)

Operator removes finished bottles and loads the next preform batch to restart the cycle.

Low CapEx — Lowest Entry Cost into PET

Eliminating the automated oven, conveyor, and preform feed system reduces machine cost dramatically versus fully automatic platforms. For brands and producers where initial production volume does not justify the CapEx of a full-automatic machine, the HGS series provides a commercially viable entry point — with a clear upgrade path to fully automatic ES or AS series machines as volume grows.

Fast Mold Changeover — Multi-Format Flexibility

Without a fixed preform handling system to reconfigure, mold changes on the HGS series take 15–25 minutes versus 45–90 minutes on full-automatic machines. For producers running 5–15 different bottle formats in small quantities, this rapid changeover enables same-day multi-format production that would be uneconomical on dedicated full-automatic lines.

Scalable 1 to 6 Cavities

Six models covering 400 bph (HGS-1, single cavity) to 1,800 bph (HGS-6, six cavities) match every entry-level and small-batch production volume. A producer can start on HGS-1 for sampling and graduate to HGS-4 or HGS-6 for commercial production without changing machine architecture, tooling standards, or operator training.

Full-Quality Bottles — Same Biaxial Orientation

Bottles produced on HGS series machines have identical biaxial molecular orientation, clarity, barrier performance, and mechanical properties to those from fully automatic machines — the stretch-blow process is unchanged. This makes HGS-produced bottles fully suitable for commercial filling, labelling, and distribution without any quality compromise versus automatic-machine output.

Compact Footprint — Minimal Infrastructure

The HGS-1 occupies just 1.2 m × 1.0 m floor area — the smallest PET blow molding machine footprint available. Even the HGS-6 at 4.2 m × 1.0 m fits within production spaces that cannot accommodate full-automatic machines. Low compressed-air consumption versus automatic machines also reduces utility infrastructure requirements.

Simple Operation — Minimal Training

The semi-automatic process requires minimal operator training compared with full-automatic machine setup and maintenance. Basic operators can be trained to load preforms and monitor bottle quality within a single shift. This is a meaningful advantage in markets or facilities where skilled blow molding technicians are scarce or expensive.

▶ HGS Series — Semi-Automatic Stretch Blow Molding (1 – 6 Cavity, PET)

6 models. Manual preform loading; automatic clamping, stretching, blowing, cooling, and mold opening. All models share the same 38 mm maximum neck diameter, 90 mm maximum body diameter, and 300 mm maximum height envelope — only cavity count, container volume, and throughput scale with model number.

Parameter / Unit	HGS-1	HGS-2	HGS-3	HGS-4	HGS-5	HGS-6
Cavities	1	2	3	4	5	6
Max. Container Volume (ml)	600	1,200	1,800	2,500	3,000	3,600
Output (bph)	400	750	1,000	1,200	1,500	1,800
Max. Neck Diameter (mm)	38	38	38	38	38	38
Max. Body Diameter (mm)	90	90	90	90	90	90
Max. Container Height (mm)	300	300	300	300	300	300
Max. Heating Power (kW)	6.75	13.5	13.5	20.25	20.25	27
Normal Heating Power (kW)	3	6	6	9	9	12
Operating Pressure (kg/cm²)	7	7	7	7	7	7
LP Air Consumption (L/min)	400	800	1,200	1,600	2,000	2,400
Blowing Pressure (kg/cm²)	30	30	30	30	30	30
HP Air Consumption (L/min)	800	1,600	2,400	3,200	4,000	4,800
Cooling Water Temp. (°C)	8–10	8–10	8–10	8–10	8–10	8–10
Cooling Water Flow (L/min)	20	40	60	80	100	120
Machine Size L×W×H (mm)	1200×1000×1600	1800×1000×1600	2400×1000×1600	3000×1000×1600	3600×1000×1600	4200×1000×1600
Machine Weight (kg)	500	900	1,300	1,700	2,100	2,500

🛠 Machine Frame

Welded steel frame, stress-relieved, with CNC-machined guide rails and bearing surfaces. The compact 1,000 mm-wide constant footprint across all 6 models means only the machine length extends with cavity count — simplifying factory floor planning. Frame height is constant at 1,600 mm, compatible with standard workshop doorways for easy installation without overhead crane access.

⚙ Blow Station

Toggle-link pneumatic mold clamping — appropriate for the semi-automatic cycle rate — with servo stretch rods providing ±0.1 mm axial positioning accuracy. The 30 kg/cm² blowing pressure (lower than the 35 kg/cm² used on full-automatic platforms) is optimised for the container volume range of this series and reduces compressor operating cost per bottle.

🔓 Blow Mold Tooling

HGS-series blow molds use the same aluminium alloy and conformal-cooling-channel standard as full-automatic machine molds — bottle quality and dimensional accuracy are equivalent. Mold cost for semi-automatic platforms is lower than for automatic machines (no preform mandrel tooling required, simpler oven interface). Changeover between bottle formats requires mold substitution only — 15–25 minutes versus 45–90 minutes on full-automatic lines — making multi-format small-batch production economically viable.

🌡 Separate Infrared Oven

The HGS series is supplied with (or compatible with) a matched infrared preform heating oven. The oven provides adjustable zone temperature control for different preform wall profiles and materials. Preform batch size in the oven matches cavity count — operators develop a workflow rhythm that keeps the oven output synchronised with the machine cycle time. Oven specifications are matched to the HGS model at the time of order.

📱 PLC Control

Siemens or Mitsubishi PLC with colour HMI touchscreen. Stretch rod position, blow pressure, blow duration, and cooling time are all PLC-controlled and stored per bottle format. Format recipe recall eliminates manual parameter setting at mold change — operators simply select the recipe for the new bottle format and begin production immediately after mold substitution.

📈 Scalable from HGS-1 to HGS-6

All six models share common spare parts for the blow station, PLC, and pneumatic system — simplifying maintenance inventory for operators running multiple HGS models. Mold tooling designed for a given neck and container envelope is interchangeable across HGS models of different cavity counts, reducing retooling cost when scaling from a smaller to a larger model.

Yes — without qualification. The biaxial orientation, mechanical properties, clarity, and barrier performance of bottles produced on HGS semi-automatic machines are identical to those from fully automatic platforms, because the stretch-blow cycle is performed by the same mechanism. The only production difference is manual preform loading versus automated feeding. HGS-produced bottles pass the same filling-line, drop-test, and top-load validation criteria as automatic-machine bottles.

The HGS machine handles clamping, stretching, blowing, cooling, and mold opening — all automatically. You additionally need: (1) an infrared preform heating oven (supplied as part of the HGS package or sourced separately) to pre-heat preforms before manual loading; (2) a chiller to supply 8–10°C cooling water to the mold; (3) a compressor providing low-pressure air at 7 kg/cm² and high-pressure air at 30 kg/cm². We supply all auxiliary equipment as part of a complete HGS package on request.

One operator per machine — and in many cases, one operator can manage two HGS machines if the preform heating time roughly matches the machine blow-and-cool cycle time. The operator’s role is: load preforms into the oven; transfer heated preforms to the blow station; initiate the cycle; remove finished bottles while the machine completes its automatic sequence; reload preforms into the oven. An experienced operator typically establishes a rhythm within the first shift that maximises throughput while maintaining preform temperature consistency.

Generally no — full-automatic machine molds interface with a different preform mandrel and mold-carrier system than semi-automatic machine molds. However, the bottle design validated on an HGS machine can be reproduced in a full-automatic machine mold without redesign — only the mold mounting interface changes. This means that the product development investment (bottle design, preform design, filling-line validation) made on the HGS platform transfers fully to the full-automatic platform when you scale up.

All HGS models are designed for a maximum neck diameter of 38 mm — covering the standard beverage neck finishes PCO 1881 (28 mm), PCO 1810 (28 mm), and up to 38 mm. Custom neck finishes within the 38 mm maximum are accommodated by the appropriate blow mold and preform combination. Preforms must be sourced to match the specific bottle design and neck finish — we can advise on preform specification at the mold design stage.

Mold changeover on HGS machines takes 15–25 minutes for an experienced operator — significantly faster than 45–90 minutes on full-automatic machines because there is no preform handling system to reconfigure. After mold substitution, select the new bottle format recipe on the HMI and run 3–5 warm-up cycles to stabilise the blow station before resuming full-rate production. Operators running 5–8 different formats in a shift typically achieve 20-minute average changeover times after the first week of operation.

Yes — and this is a common growth path we support. When your production volume justifies the transition to a full-automatic ES-series machine, the bottle design, preform specification, and filling-line process validated on the HGS platform transfer directly. We advise retaining the HGS machine for product development and new bottle trials while full-automatic machines handle commercial production — maximising the utilisation of both platforms and eliminating the risk of using valuable automatic machine time for experimental production.

HGS series machines are produced within 30–45 working days from deposit receipt — shorter than full-automatic machines due to simpler machine architecture. Blow molds for confirmed 3D bottle designs are delivered in 20–30 working days. The complete HGS package including machine, oven, chiller, and compressor can typically be installed and producing saleable bottles within 60 working days of order placement. On-site commissioning typically requires 2–3 working days.

All HGS series machines are CE-marked. Electrical component verification certificates are available. For food-contact bottle applications, documentation confirming the machine’s no-hydraulic-fluid architecture is available. Country-specific certifications can be supported subject to additional testing requirements at the destination market.

Yes. The bottle produced is a PET container whose food-contact compliance is determined by the preform resin grade, not by the blow molding machine. Using food-grade PET preforms on the HGS series produces containers meeting FDA, EU Regulation 10/2011, and equivalent food-contact standards. For pharmaceutical packaging, an oil-free compressor at the high-pressure blowing point is required — we supply matched oil-free compressor packages as part of the HGS system on request.

Send us your bottle drawing or sample, target daily output, and packaging application — our team will recommend the right HGS model and mold configuration, and issue a direct quotation for the complete package.