Cast Film Extrusion Line - China Cast Film Extrusion Line Manufacturers Suppliers

Your Professional Cast Film Extrusion Line Supplier

Jwell, a vice president unit of the China Plastics Machinery Industry Association, is a leading manufacturer specializing in plastic extrusion equipment and complete sets of chemical fiber spinning machinery. The company's main product lines include: various types of cast film, sheet, and board production lines; different kinds of plastic pipe and profile production lines; blowing molding machines; chemical fiber spinning equipment; as well as plastic recycling and compounding granulation systems. Additionally, Jwell supplies key accessories such as screw barrels, extrusion flat die heads, screen changers, and rollers.

Strong Manufacturing Capabilities
The company comprises 26 specialized subsidiaries, nine large-scale metal processing plants, and three heat treatment and nitriding facilities.

Independent Intellectual Property Rights
Jwell has established an independent intellectual property system and holds nearly 400 authorized patents.

Professional and Experienced Team
Our dedicated team collaborates with clients to identify personnel, resources, and process documentation necessary to support maintenance operations effectively.

High Production Capacity and Global Reach
Jwell produces approximately 3,000 sets of extrusion lines annually, which are exported to over 120 countries worldwide.

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Parameter

Model	Screw diameter	T-die	Products width	Product thickness	Line speed
Model	mm	mm	mm	mm	m/min
JCFPE-120-1900	Φ120	1900	1600	0.02-0.15	180
JCFPE-125-2300	Φ125	2300	2000	0.02-0.15	180
JCFPE-135-2800	Φ135	2800	2500	0.02-0.15	180

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Types of Cast Film Extrusion Line

The cast film extrusion lines produced by our company mainly include the following types:

Breathable Film Extrusion Line

CPE cast film line is a production line designed to manufacture cast polyethylene film (CPE film) using a casting process. This process involves melting polyethylene resin and extruding it onto a chill roll to create a flat, flexible film with excellent transparency, moisture resistance, and chemical resistance.

CPP Cast Film Extrusion Line

CPP cast film extrusion line is a specialized manufacturing system used to produce Cast Polypropylene (CPP) film. This process involves melting polypropylene resin and extruding it through a die to form a flat film, which is then cooled and wound into rolls.

CPE Cast Film Line

Advantages of Cast Film Extrusion Line

High Efficiency
The cast film extrusion line provides a continuous process that can produce large volumes of film quickly and efficiently. With automated systems in place, the production process is streamlined, reducing the need for manual labor and increasing overall throughput.

Customizable Film Properties
A cast film extrusion line can be tailored to produce films with specific properties, such as varying thicknesses, tensile strength, flexibility, and transparency. This versatility makes it suitable for a wide range of industries and applications.

Consistent Quality
The integrated control systems and high-precision equipment ensure that the film produced has consistent quality in terms of thickness, surface smoothness, and tensile strength. This is crucial for applications where uniformity is key.

Cost-Effectiveness
Using a cast film extrusion line can reduce production costs due to the efficiency of the process, lower energy consumption, and the ability to produce films in large volumes. Furthermore, the use of high-quality, cost-effective polymers like CPP and CPE adds to the affordability of the final product.

Environmental Benefits
Modern casting lines are designed to minimize waste and energy consumption, making them more environmentally friendly.

Cast Film Extrusion Line Production Process

Melting the Thermoplastic Materials

Plastic resins, such as polyethylene (PE) or polypropylene (PP), are fed into one or more extruders using a gravimetric feeding system. The materials are heated and melted within the extruder barrels, where they undergo mixing and homogenization to ensure a consistent melt temperature and composition. Additives like stabilizers, colorants, or processing aids may be introduced at this stage to modify the properties of the film.

Flattening and Solidifying

The molten polymer is extruded through a slot die, forming a continuous, flat sheet of plastic film. The die is crucial for controlling the width and thickness of the extruded film. Adjustments to the die gap and screw speed are made to achieve the desired film dimensions.

Trimming and Rolling

Once solidified, the cast film passes through a series of cold, polishing, and nip rolls that further refine its thickness and surface characteristics. Any irregular edges or excess material (trim) are trimmed off using automated cutting systems to minimize waste and ensure uniformity in the final product.

Comparison of Cast Film Extrusion Line and Blown Film Extrusion Line

Feature	Cast Film Extrusion Line	Blown Film Extrusion Line
Direction of Extrusion	Horizontal (flat die)	Vertical (circular die)
Cooling Speed	Fast cooling on chill rolls	Slow cooling (air cooling)
Film Clarity	High clarity, glossy finish	Less clarity, matte finish
Film Strength	Less puncture-resistant	Higher puncture resistance
Unwind Noise	Quiet unwinding	Noisy unwinding
Best For	High-speed, high-clarity applications	Heavy-duty packaging, stretch wrap

Packaging and Shipping

Packaging	In wooden cases, wooden splints, wrap film and other specialized packaging film, to ensure that the machine impact damage in the long time of land and sea transport, thus reaching the customer factory intact.
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

Asia's largest and fastest growing professional plastic machinery equipment manufacturer , Jwell Machinery Co., LTD., founded in 1997. until now, Jwell factory covers more than 700,000 square meters and has 8 production bases and 26 professional extrusion companies in the world. They are located in Shanghai, Zhejiang provinces, Jiangsu provinces, Guangdong Province and Thailand.

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FAQ

Q: What is the cast film extrusion process?

A: The cast film extrusion process is a method of producing plastic films by melting plastic resins and extruding them through a flat die onto a chilled roller for solidification. This process is commonly used for creating films used in packaging, such as food packaging, stretch films, and industrial laminates.

Q: What is the working principle of a cast film extrusion line?

A: Plastic pellets are fed into the extruder and heated to melt. The extruder screw rotates to mix the melt evenly, and then the melt is extruded through a flat die to form a thin - film. The film is quickly cooled by the cooling unit, and finally, the trimmed film is wound into rolls by the winder.

Q: Can cast film extrusion lines produce multi - layer films?

A: Yes, through the co - extrusion process, by adding a co - extrusion feed block and multiple extruders, cast film extrusion lines can produce multi - layer films, and can produce up to 5 - layer films generally.

Q: What are the components of the cooling unit in a cast film extrusion line?

A: It usually includes a primary quenching roll for rapidly cooling one side of the film, a secondary roll for cooling the other side, and a vacuum box and air knife for enhancing cooling efficiency and film stability.

Q: How to adjust the production speed of a cast film extrusion line?

A: It can be adjusted by changing the screw speed of the extruder, the cooling speed of the cooling unit, and the winding speed of the winder. It is necessary to ensure the coordination of each part to avoid problems such as film breakage or uneven thickness.

Q: What are the application fields of cast film extrusion lines?

A: They are widely used in food packaging, industrial protection, laminated films, stretch films, and other fields, and can also be used for the production of blister films and masking films.

As one of the most professional cast film extrusion line manufacturers and suppliers in China, we're featured by quality products and competitive price. Please rest assured to buy cast film extrusion line made in China here from our factory. Contact us for quotation.

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