Blown Film Production Line FAQ: Twin Head Specifications, Ordering and Support Questions

Buyers evaluating a twin head blown film production line often have questions about output capacity, compatible materials, space requirements, and customization possibilities before placing an inquiry. The sections below address the most common questions in a direct, fact-based format, based on Chengheng Plastic Machinery Co., Ltd.'s published product documentation.

For full technical details and to request a quote, visit the Twin Head Blown Film Production Line product page.

What is a twin head blown film line and how does it differ from a single-head machine?

This machine produces two independent plastic film rolls from a single screw cylinder by integrating dual die heads, dual upper tractions, and dual winders into one reinforced frame. A conventional single-head extruder produces only one roll per cycle. The twin-head design doubles output per cycle and, because power systems and cooling infrastructure are shared, reduces energy consumption and workshop footprint compared with running two separate machines.

What film widths and thicknesses are supported?

The width range is 150 mm – 550 mm (model dependent). Thickness ranges differ by material: HDPE: 0.008–0.08 mm and LDPE: 0.02–0.12 mm.

What is the production output range?

The published output range is 25 kg/h – 120 kg/h, depending on the model and operating configuration.

Which materials are compatible?

The system supports HDPE, MDPE, LDPE, LLDPE, CaCO₃-filled compounds, and recycled resins. The dual-head configuration also allows operators to run different material grades — such as food-grade and industrial-grade PE — simultaneously on each head.

What screw and die options are available?

Screw diameters are available in Φ50 mm, Φ55 mm, and Φ65 mm, with a fixed L/D ratio of 32:1 and force feeding included as standard. Die diameters are available in Φ50 mm, Φ60 mm, and Φ80 mm. Gear box models are 173#, 180#, and 200#, with main motor power options of 15 kW, 22 kW, and 37 kW.

Is customization available?

Yes. Customization is available based on material requirements and width needs. Screw L/D ratios and die diameters can be tailored to specific resin characteristics and output goals. Contact Chengheng Plastic Machinery Co., Ltd. with your target material type, film width, and required output to discuss a configuration.

How much workshop space does the twin head system require compared with two separate lines?

The integrated frame design saves over 50% of workshop floor space compared with two separate single-head machines, because both die heads, tractions, and winders share a single reinforced structure.

Does the whole line stop if one head requires maintenance?

No. Each head operates independently, so maintenance or a material change can be carried out on one side while the other continues running. This minimizes total downtime for scheduled maintenance or resin changeovers.

What products are typically manufactured?

The system is optimized for small-width LDPE and HDPE films used in T-shirt bags, rolling bags, and commercial shopping bags, as well as films for food packaging and textile packaging applications.

How does energy use compare with running two single-head lines?

Because the system shares a single main motor and a combined cooling water pump, energy consumption is optimized relative to two independent extruders each with separate motors and cooling circuits. The shared infrastructure also lowers the overall acquisition cost.

For full specifications and to submit an inquiry, visit the [Twin Head Blown Film Production Line](https://www.cnchsj.com/product/twin-head-blown-film-production-line-china-factory-and-leading-suppliers.html) page on the Chengheng Plastic Machinery Co., Ltd. website.