Accumulator Type of Blow Molding Machine
Accumulator Die Head Type of Blow Molding Machine
The Accumulator Head Blow Molding Machine is a widely used piece of equipment in the plastics processing industry, primarily designed to manufacture medium- to large-sized hollow plastic products. Its operating principle involves temporarily storing molten plastic resin in an accumulator cylinder. Once the mold is closed, the material is rapidly extruded in a single stroke to form a parison. Compressed air is then injected to inflate the plastic against the mold cavity walls, forming a hollow product after cooling.
The primary advantage of this molding method is its ability to ensure a stable material supply and to enhance parison wall-thickness uniformity. It is particularly well-suited for producing large-scale or irregularly shaped products with thick walls, such as large plastic drums, automotive fuel tanks, industrial containers, water tanks, traffic cones, and sports equipment shells. Injecting a large volume of plastic at once effectively prevents "parison sag" (stretching due to gravity), making it ideal for products requiring precise control over thickness and shape.
Furthermore, using multi-layer co-extrusion technology, accumulator machines can produce composite products with functional structures such as oxygen or light barriers. This effectively prevents gas evaporation and permeation, enhancing the product's durability and functionality.
In summary, the Accumulator Head Blow Molding Machine offers high efficiency, excellent stability, and a wide range of applications. It remains a cornerstone of large-scale hollow-plastic production and plays a vital role in advancing modern plastic molding technology and industrial applications.
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When to Choose an Accumulator-Head Blow Molding Machine
An accumulator head suits parts that are large, heavy or long, such as drums, water tanks, floats, automotive air ducts and large hollow articles. Molten resin collects in a chamber in the die head, and a vertical ram pushes out the complete parison in one stroke when the mold is ready, which helps limit parison sag. Chen Way describes its die head as having two heart-shaped flow channels designed for a parison without weld lines.
Bottles and jerry cans up to 30 L are usually better served by continuous extrusion. For larger parts, screw size, accumulator volume and clamping unit are matched to the shot weight; the output range on each machine page is extruder throughput, not finished parts per hour, and multi-point parison programming is an option rather than standard. See the double L-ring drum machine for a dedicated drum configuration, and send part drawings and shot weight for a project proposal.