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90 screw, 2 stations, 1 cavity
Buck machine
Machine Introduction
This 90 screw semi-automatic fully hydraulic dual-station single-cavity blow molding machine is specially designed for manufacturing HDPE plastic barrels with maximum capacity of 20 liters.
Adopting full hydraulic drive system, the equipment runs smoothly with stable clamping force and low failure rate. Dual-station design greatly improves production efficiency, one station completes blowing while another station finishes product unloading, saving cycle time. The 90mm screw plasticizing unit ensures uniform raw material melting, consistent wall thickness of finished barrels.
It can produce various plastic containers, including chemical barrels, water storage barrels, liquid packaging barrels, pesticide bottles and daily-use plastic pails. Suitable for HDPE raw materials, widely used in chemical industry, daily packaging, food and agrochemical packaging fields.
The machine features simple operation, easy mold replacement and convenient maintenance. Custom molds are available to make different shapes of plastic barrels according to customer requirements.
| 螺杆 screw | 90MM |
| 最大容量 Max. product volume | 20L |
外形尺寸 size | 4200*1900*2450MM |
机器重量 weight | 8T |
塑化能力 Plasticizing ability | 150Kg/H |
加热功率 Heating power | 13.2KW/H |
挤料电机 Extrusion motor | 30KW |
油泵电机 Oil pump motor | 15KW |
减速器 reducer | 225 Hardened tooth surface, high strength,low noise and anti-wear reducer |
模板尺寸 Template size | 450*450MM |
锁模力Clamping force | 200KN |
| 中心距 center distance | 0 |
Machine head
Center feed die head
Mould opening and closing mechanism
Hydraulic mold clamping, Hydraulic mold shifting

Electric box
Screw heating,
nitriding steel 38CrMoAlA
5 Cast aluminum heating coil
Mitsubishi PLC Touchscreen + Wall Thickness Controller
Temperature controller
Automatic de flash device
The machine can add automatic de flash function to reduce labor costs
Servo system Inverter
Delta from Taiwan
RBCA Inverter
1. Fully hydraulic drive system, stable clamping force, smooth running, less vibration, uniform barrel wall thickness.
2. 90mm large screw ensures fast plasticization, even material melting, and high-quality HDPE barrel performance.
3. Dual-station structure greatly improves output, high efficiency for mass production.
4. Single-cavity precision molding, specially designed for 5L–20L large plastic barrels, full forming without deformation.
5. Semi-automatic control, easy operation, save labor cost, friendly for new workers.
6. Wide production range, can make all kinds of HDPE buckets, chemical barrels, water tanks and packaging containers.
7. Quick mold change support, customized barrel shapes and sizes available.
8. Heavy-duty machine body, durable, low failure rate, suitable for long-time factory production.
This 90 screw hydraulic blow molding machine is mainly used for producing 5L-20L HDPE plastic barrels and hollow containers, widely applied in multiple industries:
1. Chemical Industry
Produce chemical barrels, detergent barrels, paint barrels, ink containers, and industrial liquid packaging buckets.
2. Agricultural & Pesticide Industry
Manufacture pesticide barrels, fertilizer barrels, agricultural water storage buckets and farm chemical packaging containers.
3. Daily Chemical & Water Treatment Industry
Suitable for domestic water storage barrels, purification buckets and daily cleaning liquid packaging containers.
4. Automobile & Machinery Industry
Produce antifreeze barrels, windshield washer fluid barrels, engine oil barrels and lubricant packaging buckets.
5. Food Packaging Industry
Produce food-grade water storage barrels and food liquid plastic containers.
6. Custom Export Packaging
Support customized open-top & closed-top plastic barrels for overseas export orders, suitable for foreign trade manufacturers.

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Cangzhou Buck Machinery Manufacturing Co., Ltd. is a professional export-oriented company specializing in the research, development, production, and sales of fully automatic and semi-automatic electric blow molding machines.
We mainly produces a full range of efficient, energy-saving, and highly stable blow molding equipment, covering small, medium, and large models. It can manufacture plastic bottles and hollow plastic products from materials like HDPE, PP, and PET, widely used in daily chemicals, beverages, food, pharmaceuticals, industrial packaging, and household goods.
We provide global customers with one-stop services including equipment customization, mold development, on-site installation guidance, and lifetime after-sales technical support. With excellent product quality, competitive factory prices, and thoughtful foreign trade services, we have been deeply cultivating overseas markets for many years.
Q: How to choose between fully‑automatic and semi‑automatic blow molding machines?
A: Choose semi‑automatic for small‑batch production, limited budget and frequently‑changed product specifications. Choose fully‑automatic for mass‑volume production, labor saving and stable continuous output. A semi‑automatic machine requires 1‑2 workers for part taking and trimming, while the fully‑automatic model supports near‑unmanned operation.
Q: What products are suitable for accumulator‑head blow molding machines?
A: It is mainly used for large‑capacity hollow articles, such as 20L‑200L chemical drums, water tanks, amusement parts and automotive plastic components. It fits heavy‑weight thick‑wall products which ordinary machines cannot produce.
Q: What plastic materials can the blow molding machine process?
A: Main materials: HDPE, PP. Some models support LDPE and EVA. For PET bottles, injection‑blow integrated machines are recommended; ordinary hollow blow molding machines are not ideal for PET processing.
Q: What auxiliary machines are required for a blow molding unit?
A: Chiller, screw air compressor, auto loader, material mixer and plastic crusher. Optional equipment includes mold temperature controller and material dryer based on raw materials and output requirements.
Q: Which machine is suitable for 1‑5L plastic bottles?
A: Medium‑small fully‑automatic blow molding machines are recommended for 1‑5L daily‑chemical bottles and oil bottles. Multi‑cavity molds can be matched to improve production capacity.
Q: What causes uneven wall thickness of finished parts?
A: ① Improper die head gap adjustment; ② Unstable parison extrusion speed; ③ Raw material temperature fluctuation; ④ Inconsistent mold cooling performance; ⑤ Unstable extrusion pressure of accumulator head.
Q: How to solve air‑bubble defects on blow‑molded products?
A: Dry damp raw materials; reduce barrel temperature to avoid material decomposition; check screw compression ratio; remove moisture and impurities inside raw materials.
Q: Obvious parting line and large flash on products, how to fix?
A: Insufficient clamping force; worn mold parting surface; excessive clearance of clamping mechanism; excessive parison material volume.
Q: Products cannot be fully blown out or have local depressions?
A: Insufficient blowing air pressure; blocked blowing nozzle; over‑fast mold cooling; too‑short parison; blocked mold exhaust holes.
Q: Difficult demolding, plastic sticking to mold cavity?
A: Excessively high mold temperature; insufficient draft angle; rough mold cavity surface; over‑high raw material temperature; appropriate release agent can be added.
Q: What pre‑start‑up inspections shall be done for new machines?
A: Check hydraulic oil level, air compressor pressure and chiller water circulation; confirm mold fastening; keep heating zones at target temperature for 30‑minute heat preservation; perform dry clamping test before feeding raw materials.
Q: What to do if hydraulic oil temperature is too high?
A: Check cooling performance of chiller; replace aged hydraulic oil; reduce excessive relief‑valve pressure; avoid long‑time non‑stop running. Replace hydraulic oil periodically.
Q: Daily maintenance for screw and barrel?
A: Clean barrel thoroughly when switching raw materials; lower temperature for long‑time shutdown; prevent metal hard objects from entering feeding port to avoid screw scratch; inspect wear clearance regularly.
Q: How often to sharpen crusher blades?
A: Inspect blades every 2‑3 months under normal production. Sharpen blunt blades timely. Over‑large crushed particles will harm finished product quality.
Q: Frequent alarm of chiller, root causes?
A: Filter blocked by impurities in cooling water; insufficient water level; dust‑covered condenser; excessive ambient temperature; blocked circulating pipeline.
Q: What is your machine lead time?
A: 30‑45 working days for standard models; 45‑60 working days for customized and accumulator‑head models, excluding sea freight time.
Q: Can the machine match our local voltage?
A: Yes. Voltage and frequency can be customized according to clients’ local power grid for motors and electric control system.
Q: Do you supply molds? What is mold service life?
A: Custom‑developed molds are available. Aluminum alloy molds: hundreds of thousands shots; steel molds: more than one million shots, subject to products and raw materials.
Q: What services are included for exported machines?
A: Pre‑shipment inspection & testing; English operation manual; remote video guidance for installation & commissioning; oversea on‑site technical service available (travel expenses borne by buyer); lifetime technical after‑sales support.
Q: What is the warranty period?
A: 12‑month whole‑machine warranty. Wearing parts (blades, sealing rings, heater bands) are excluded from warranty. Original spare parts can be supplied continuously after warranty expiration.
Q: How much floor space does the machine need? How large workshop is required?
A: Medium‑small fully‑automatic machine occupies about 6‑10 ㎡. Large accumulator‑head machines need larger space. Extra space shall be reserved for auxiliary machines and finished‑goods turnover. You may send your site dimension for our layout suggestion.
