Plastic Straw Making Machine

Plaststråmaskine

Are you looking for a machine to manufacture plastic straws or tubes? KEZHI offers you quality assurance, reliability and excellent value.

Kezhi -maskiner kan give dig en fremragende produktionslinje for at gøre dit projekt til en succes.

Produkterne Kezi Tilbyder dig

Kezhi er en førende producent, der er specialiseret i udvikling og produktion af forskellige stråfremstillingsmaskine, halmpakningsmaskine, halmbøjningsmaskine. Vores forpligtelse til kvalitet har placeret os som en udbyder af top-tier halmproduktionsløsninger på verdensplan

General Applications For The Production Line

The line can be used to make not only beverage straws, but also coffee stirrers, lollipop sticks, nozzle tubes, pen refills and other small profiles by changing the molds, providing more options for your production.

Introduktion af Maskine

The PP (Polypropylene) straw making machine is a state-of-the-art, high-efficiency production line designed for manufacturing high-quality drinking straws from polypropylene material. This machine integrates advanced technology and superior engineering to deliver consistent, reliable performance, making it an ideal choice for businesses looking to produce straws in large quantities.

Main Components

1. **Extruder**:
– **Function**: Melts and extrudes the polypropylene material into straw tubes.
– **Features**: Equipped with a high-performance screw and barrel, temperature control system, and a powerful motor for smooth and efficient extrusion.

2. **Mould Head**:
– **Function**: Shapes the extruded polypropylene into uniform straw tubes.
– **Features**: Precision-engineered mould heads that can be easily changed to produce straws of different diameters and thicknesses.

3. **Cooling System**:
– **Function**: Rapidly cools the extruded straws to retain their shape and strength.
– **Features**: Typically includes a water cooling tank with adjustable temperature controls to ensure optimal cooling.

4. **Haul-off Unit**:
– **Function**: Pulls the cooled straws from the extrusion line at a consistent speed.
– **Features**: Adjustable speed settings and precision rollers to handle straws gently and maintain their quality.

5. **Cutting Unit**:
– **Function**: Cuts the continuous straw tube into individual straws of desired lengths.
– **Features**: High-speed cutting mechanism with length control and smooth, burr-free cutting edges.

6. **Collector and Stacker**:
– **Function**: Collects and stacks the finished straws for easy packaging.
– **Features**: Automated systems to arrange and stack straws efficiently, minimizing manual handling.

The PP straw making machine is the perfect solution for businesses looking to enhance their production capabilities and meet the growing demand for polypropylene straws. With its superior performance, flexibility, and ease of operation, this machine stands out as a top choice in the straw manufacturing industry.

Features of extruder

The most important part of the production line, where the tubing is extruded

Temperature control

Infrared heating, which is fast and gentle heating, dedicated to the production of high-end pipes, and does not cause secondary damage to the extruded material.

Main Screw

Special designed 65mm/50mm screw to meet the characteristic of bioplastic material.
L/D: 33:1
meets the production of PP materials.

Mould Head

Precision-engineered mould heads that can be easily changed to produce straws of different diameters and thicknesses.

Two moulds will be offered with machine

Driving Motor

Using 11KW/ 30Kw three-phase asynchronous motor, output torque is bigger, production is more stable, the product is mature and easy to maintain.
Servo motor optional

Gear Reducer

Special hardened gear reducer for plastic extruder, Guomao brand, reliable quality,
Ratio 12.5

Inverter

Delta inverter, famous brand, stable and reliable performance, the most recognized inverter in the straw industry

Cooling water sink features

In the second part of the line, the extruded pipe will be cooled and better shaped here.

Traction & Cutting Machine features

In the third part of the line, the extruded pipe will be pulled and cut into small pieces here.

Required Hjælpeudstyr

These two machines are necessary for the production line running.

Hvordan det Fungerer

Fra denne video finder du ud af, hvordan den fungerer,

Maskine Specifikationer

Find some specifications of the plastic straw production line

Model		KZ-011-50
Strømforsyning	Main Screw	380V,3Phase,50HZ, 7.5KW(VFD)
	Sub-Screw	/
	Heating	9KW
	Hauling motor	0.75KW(VFD)
	Cutting Motor	0.75KW(VFD)
	Total Power	18KW
Extruder	Main Screw diameter	50mm
	Screw L/D	28:1
	Gearbox	ZLY133
	Temperature controller	5 SETS
	Motor	WANMAN
	Gear reducer	GUOMAO
	Inverter	DELTA
	Electric control cabinet	1 set
Cooling water sink	Length	4.5meters
	Material	304 Steel stainless
	Water storage tank	1 set
	Blow dry device	1 set
Traction & Cutting Unit	Traction unit	1set
	Cutting unit	1set
	motor	0.75KW(VFD) *2
	Cut end	90°/60°/45°
	PLC control	Optional
L shaped straw collecting machine	Optional
Air compressor	7.5KW(10HP)
Industrial chiller	5HP, water cooled / air cooled

The Basic Knowledge About Plastic Extrusion Machine

A brief introduction to plastic extruders to help you get a basic understanding of the machine

What is plastic extrusion machine?

Plastic extrusion is a high-volume manufacturing technique in which raw plastic, typically in pellet form, is melted and extruded into a continuous profile. The process initiates as the resin is loaded into the extruder’s hopper and moves down into the barrel, where it is progressively heated until it melts. Following this, a screw mechanism drives the molten plastic through a die, which molds it into the required shape. As it cools and solidifies, it assumes the final form of various products, ranging from pipes and plastic sheeting for weather-stripping to wire insulation. This method is highly valued across various industries for its efficiency, versatility, and consistent ability to produce large volumes.

Working principle of plastic extruder

The Role of Extruders in Plastic Extrusion

Extruders serve as the core component in the plastic extrusion process, consisting primarily of a heated barrel outfitted with a rotating screw. The process begins with the introduction of raw plastic materials, typically in pellet form, into the extruder via a hopper. As the screw rotates, it drives the pellets forward into the barrel, where they encounter significant heat and pressure, causing them to melt into a viscous fluid. This fluid plastic is then extruded through a die—a tool engineered to mold the plastic into the specified profile as it emerges from the machine. The plastic product is subsequently cooled and solidified, retaining its shape as it is segmented into predetermined lengths. This method is crucial for producing continuous lengths of plastic in diverse shapes, thereby playing a pivotal role in various industrial applications.

Components of a Plastic Extrusion Machine

A standard Plastic Extrusion Machine is composed of several key components, each playing a crucial role in the extrusion process:

1. Hopper: The initial entry point for the raw plastic material, generally in pellet form. The hopper channels the material into the extruder’s barrel.
2. Barrel: This component encases the extruder screw and is fitted with heaters to melt the plastic. It is constructed to endure high pressures and temperatures.
3. Extruder Screw: A critical component that transports the plastic pellets from the hopper to the barrel’s far end. Its rotation not only moves the pellets but also generates the heat needed to melt them through friction.
4. Heaters: Positioned along the barrel, these elements assist the screw in melting the plastic and maintain the required temperature for successful extrusion.
5. Die: This custom-designed part shapes the molten plastic. It is tailored specifically to match the product’s desired profile.
6. Cooling System: Post-extrusion, the shaped plastic must be cooled and solidified. This system can include elements like fans, water baths, or cooling rollers.
7. Cutter: This tool segments the newly formed plastic into desired lengths and can range from a simple guillotine to a more intricate rotary cutter, depending on the product specifications.

Plastic Extrusion Machine Operating

The operation of a plastic extruder involves a systematic procedure to ensure efficient production of plastic products. The first step is to load the plastic pellets into the hopper, set the temperature control of the machine, and switch on the heater. The plastic is melted in the barrel and pushed towards the die head by the extruder screw. It is vital to ensure that the temperature and speed of the extruder screw are set correctly to achieve the desired quality of the end product. Once the molten plastic has passed through the die, it takes the desired shape. It is then cooled and solidified in a cooling system before being cut into specified lengths by a cutting machine. It is important to note that the smooth operation of a plastic extruder requires constant monitoring and timely adjustments to maintain optimum output and quality.

Downstream equipment in plastic extrusion

Downstream equipment in plastic extrusion pertains to the array of machinery deployed post-extrusion to apply final modifications to the product. This equipment performs various crucial functions such as cooling, cutting, pulling, and winding to enhance the final attributes of the extruded plastic. Key types of downstream equipment include:

Cooling Tanks: These units are essential for cooling the extruded plastic to solidify and stabilize its shape. The cooling medium—either chilled water or air—is selected based on the plastic type and the specifications of the final product.

Pullers: These mechanisms ensure the extruded plastic maintains consistent speed and tension, critical for achieving uniform shape and size throughout the product. Available in various forms, such as belt pullers and roller pullers, they cater to different extrusion needs.

Cutters: After the cooling phase, cutters are employed to trim the extruded product to required lengths, ensuring precision in final measurements.

Coilers or Winders: For products such as tubes or profiles, coilers or winders collect the output on spools or reels, facilitating easier handling and transport.

Screen Printers: For products that need printed details or branding, screen printers are utilized to apply designs directly onto the surface of the extruded plastic.

The selection of downstream equipment is tailored to the specific type of product, material properties, and production demands. This equipment is integral to the extrusion process, playing a pivotal role in ensuring that the final product adheres to the set quality standards and meets precise specifications.

Considerations when choosing a machine

Productivity: High-capacity machines produce more product in less time, resulting in lower unit costs and a higher return on investment.
Energy Consumption: Machines with low energy consumption can significantly reduce operating costs and increase ROI.
Maintenance costs: Frequent maintenance can lead to increased costs and production downtime. Therefore, machines that require less maintenance can improve ROI.
Versatility: Machines that can process a wide range of plastic materials can meet a variety of production needs, increasing profitability.
Lifespan: The longer a machine’s lifespan, the higher the return on investment, as the initial investment can be spread over more production units.
Resale value: If the machine maintains a high resale value, the return on investment will increase.

Type of straw extrusion machine

In terms of material: there are pp straw extrusion machine, PLA straw extrusion machine, PHA straw extrusion machine,

In terms of main screw diameter: 50 mm and 65 mm main screws are available for the production of different diameter ranges of straw.

In terms of straw colour: single colour, two colour, two colour co-extrusion, three colour and three colour co-extrusion straw extrusion machine

Extruded pipe diameter adjustment

To precisely adjust the diameter of a pipe produced by an extrusion machine, various factors and settings must be meticulously managed and optimized:

1. Die and Calibrator Settings:
– Confirm that the calibrator is correctly aligned and sized, usually 3-5% larger than the target pipe diameter.
– Modify the die gap to suit the required pipe diameter. Increasing the gap enlarges the diameter, whereas reducing the gap decreases it.

2. Pressure Fluctuations:
Unstable compressed air can lead to uneven wall thickness in the pipe. This suggests that fluctuations in internal air pressure can cause variations in the pipe’s diameter or wall thickness

3. Extruder Throughput and Temperature:
– Alter the extruder throughput—decreasing it will reduce the pipe diameter, while increasing it will enlarge the diameter.
– Optimize the temperature settings of the extruder to ensure a consistent melt flow and prevent complications such as pipe sagging that can alter the diameter.

4. Traction Speed:
– Modify the haul-off unit’s speed. Accelerating the traction speed decreases the pipe diameter, while slowing it increases the diameter.

5. Cooling System:
– Adjust the cooling system, specifically the water flow and temperature in the cooling tanks, to guarantee even cooling. Non-uniform cooling can cause fluctuations in the pipe diameter.

6. Tooling and Sizing Equipment:
– Choose appropriate tooling for the specified pipe dimensions and ensure it is well-maintained and accurately calibrated.

By meticulously managing these parameters, the diameter of the pipe from the extrusion machine can be effectively controlled and precisely adjusted to meet specific requirements.

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