double L-ring-drums blow molding machine
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Accumulator blow molding machine produces plastic Double L-ring barrel drums for chemical liquid container

Features & Application

Accumulator blow molding machine produces plastic Double L-ring barrel drums for chemical liquid container

Plastic L-ring drums by blow moldingThis accumulator blow molding machine produces 100L 220L Chemical Plastic barrel L-ring drums These large, heavy duty L-Ring Drums are manufactured from high density polyethylene (HDPE) plastic, which will withstand heavy handling. These robust industrial containers are both food grade and UN approved, for the bulk storage and transportation of water, food, hazardous chemicals, oils, adhesives, lubricants, toiletries and many other materials. The 60 or 220 litre drum has a 60mm black screw cap and two attached black handles, for easy carrying.  120 litre and 210 litre blue tight head drums have been extrusion blow-moulded and they have a minimum thickness of 2.5mm. Due to their strong, rigid build, these tight head drums can be easily rolled to save on machinery. Both of these drums have two 2 inch white internal threaded bung closures. L’ring drums also called tight head or closed head drums These drums are easy to handle, complements or replaces metal drums and have the following characteristics: – Improvement in complete drainage – Better transport security – Approved by leading European companies. Our this accumulator blow molding machine is special designed for this L-ring drums from 60L to 220 L.

Accumulator head blow molding machines are a subset of intermittent type blow molders. In this method, the extruder moves backward and forward similar to an injection molder. The molds are located under a mono layer die head, and they remain in the same place—opening and closing to drop the extruded parts.

Accumulator heads are actually a type of reciprocating screw molder, but they have a much larger shot size than a standard reciprocating screw. This equipment allows plastic to “accumulate” in the screw until it reaches the required volume for the product; only then is it shot into the mold. As a result, accumulator blow molders have larger average shots between 3 and 75 lbs.

Accumulator head blow molding machine are best for large-sized, high-capacity products and typically run HDPE resin. The most common applications for accumulator blow molding machines include:

  • Chemical Drums
  • Water Storage Containers
  • Polycarbonate Bottles
  • Large Hollow Containers
  • IBC Tanks
  • Large Industrial Parts
  • Automotive Panels
  • Industrial Containers
  • Large Houseware Items

SUPER JINJUN offers the most suitable Accumulator Head type Blow Moulding Machines for wide-ranging industrial and packaging applications, for storage and transport of hazardous liquids and applications in the packaging fields – in the food and  non-food sectors.

20L-Jerry-can by blow molding

▪ Water bottles: 10 – 20 lit. (3 – 5 Gal.)

▪ Jerry cans: 10 – 30 lit.

▪ Containers: 30 – 120 lit.

▪ Open top Drums: 30 – 220 lit.

▪ L-Ring Drums: 120 – 250 lit.

▪ Furniture like Table-tops, Chairs: 75 – 250 cm.

▪ 1000 lit. IBCs

▪ Water Tanks: 250 – 1000 lit.

▪ Automotive components, Air ducts

▪ Tool- boxes, Suitcase-shells, Storage vessels

▪ Customised hollow-shaped articles can be tailor-made to design.


The extruder is mounted on a robust frame which is driven vertically by electric motors for height adjustment. The extruder unit consists of a heated and cooled screw and barrel assembly driven by a double reduction helical gear box connected by V-belts to a variable speed AC motor or PMS motor with vector inverter control. It is laid out according to the polymer to be processed – with a grooved feed screw or barrier flight screw and optional Maddock mixing head, etc. to meet different process-parameters of the specific raw material. The main frame is the structural foundation for the extruder height adjustment and dies-centering function. Both independent hydraulic systems are installed on the main frame. The control cabinet which houses the “MACO” modules and the power supply are also installed on the main frame.


The accumulator head is designed with four spiral channels to ensure high quality and stress-free parisons. Fast color changes are a key feature of this design. Injection and servo parison actuators are located on top of the die head and perform material purging and parison programming.


The unloading robotic gripper takes the article at the top from the clamping platen to the de-flashing area via in-out traverse mode. It is driven electrically, with adjustable stroke and is synchronized with hydraulic and/or pneumatic systems. The gripper keeps the machine’s mould-clamping area safe for the operator. The gripper arms are water-cooled and is connected to the machine’s chilled-water circuit for maximum efficiency and to prevent sticking of the hot article to the gripper arms.


This tie-bar-less clamping unit with locking bar device provides easy access and versatility for a wide variety of moulds and applications — especially for large articles. It employs 4, 6 or 8 cylinders directly on to the side of the platens and operates in full synchronization. By means of an electronic-hydraulic master-slaves control system for the locking bars, it ensures accurate mould closure and secures mould-locking with precisely defined clamping force distribution. The absence of tie-bars maximises the full platen area for large-sized moulds. The system ensures perfect mould closing movement, with the aid of proportional valve for the locking movement. The entire unit can be moved on rails by means of hydraulic cylinder, out from the die-head area. By using an overhead crane or forklift, the operator can achieve fast and easy mould change.


As SUPER JINJUN standard design two independent hydraulic power pack systems are provided. One system operates the clamp opening/closing, clamping unit position, blow-pin movement, and the other system enables injection and parison control. High and low-pressure design plus the energy-saving Nitrogen accumulators enable high speed clamping strokes via direction proportional valve, ensuring smooth and well-controlled motions. 100-point parison programming control operated via servo valve combined with the same control system ensures precise control of the parison wall-thickness in vertical direction for optimum material savings and increased mechanical strength and quality.


A custom-made design to meet the specific requirements of the product, complete with various processing functions, such as parison stretch pin device, top pinch, pre-blow, needle-blow, bottom pinch, blow pin unscrewing function for openings with inner thread.


The Partial Wall Thickness Distribution System allows the dynamic influence of the radial die gap along the parison length related to prescribed application curves. By using PWDS system an average weight will reduce by 8% to 13% and average cycle time reduce by 10% to 15%, to reach better wall thickness distribution, with maximum flexibility in production, the adjustments of PWDS can be adapted to changing requirements at any time.


▪ 100-point parison wall-thickness profile programming

▪ Parison push-out profile velocity control

▪ Actual tooling position profile and parison set profile are displayed on the same screen for convenient monitoring of the tooling position against the profile set point.

▪ Automatic tuning of heating/cooling temperatures

▪ Internal cartridge for recipe storage

▪ Precise hydraulic clamp control

▪ Programmable screen display

▪ Consistent and uniform pre-set wall thickness and parison length

▪ Various parison interpolation methods such as flat, linear and hyperbolic.

▪ Tooling position is adjusted evenly every 100 microseconds to ensure uniformly high precision products with tight tolerances. ▪ Available with communication link for whole plant for highly integrated manufacturing.

Check this video to see how our accumulator blow molding machine works on double L-ring barrel drums production:






Parameters for this accumulator blow molding machine:

机型 Model TDB-250F/P
基本参数 Specification
工位数 Station 单 Single
制品最大容积 Max. Product volume L 250
空循坏 Dry cycle pc/h 300
塑料挤出量 Output of HMWHDPE kg/h 200×2
机器重量 Weight of machine kg 36000
机器外形尺寸 Size of machine m,L×W×H 8.2×2.9×5.4
模头 Die Head
最大口模尺寸 Max. Die diameter mm 290
模头加热段数 Die Head Heating Zone 8
储料量 Capacity of Accumulator head L 22
模头加热功率 Die Head Heating power KW 53
开合模系统 Clamping Unit
开合模行程 Platen Distance mm 800~1800
锁模力 Clamping force KN 770
挤出系统 Extruder Unit
螺杆直径 Screw  Diametre mm 90×2
螺杆长径比 Screw Length/Diametre Ratio 32
螺杆加热功率 Screw heating power KW 26.5×2
螺杆加热区段 No.of heating zone(Screw) 4×2
动力系统 Power Unit
油泵电机功率 Hydraulic Pump Driving Power KW 42.5+21+11
螺杆电机功率 Screw Motor Power KW 75×2
装机总功率 Total Power KW 330.5
备注 Remarks
气体用量 Air consumption m3/min 2
吹气压力 Blow pressure Mpa 0.6
冷却水压力 Cooling water pressure Mpa 0.3
用水量 Water consunption L/min 300
模具最大尺寸 Max.Size of Mold mm,W×H 1200×1720
Effective Dimension Of Mould Plate