Small plastic extruder

(10882 products available)

New Single screw <strong>small</strong> <strong>plastic</strong> <strong>extruder</strong>

New Single screw small plastic extruder

$4,200.00
Min. Order: 1 set
Shipping per piece: $123.59
9 yrsCNSupplier
5.0/5.0·1 reviews

About small plastic extruder

Types of small plastic extruder

A small plastic extruder is an industry-grade equipment used to manufacture plastic products in large quantities. Generally, extrusion involves melting plastic and molding it into different shapes to create end products. According to the Plastic Extrusion Manufacturers Association, extruders can be classified into categories based on various factors, such as the design of the screw, functions, and size.

  • Based on screw design

    An extruder can be classified based on screw design into two main types: single-screw and twin-screw. Single-screw extruders have a single screw rotating in a barrel. They are suitable for simple processes and low-production plastic products. On the flip side, twin-screw extruders have two parallel screws in a barrel. They offer better mixing and higher capacity, making them suitable for more complex production.

  • Based on function

    An extruder can also be classified based on function into reactive and standard extrusion. A standard extruder uses heat and pressure to melt plastic and shape it into products like films, sheets, and profiles. Reactive extruders go a step further by involving chemical reactions, such as adding new material or changing plastic's properties. This can lead to more advanced products like composite materials or modified plastics.

  • Based on size

    Extruders can also be classified based on size into small-scale, large-scale, and medium-scale extruders. Small-scale extruders are typically used for laboratory and educational purposes. They have low capacity, usually below 5kg/h. Medium-scale extruders are suitable for small to medium production. Their capacity ranges from 5-50kg/h. Large-scale extruders are ideal for industrial applications. They have high capacity of more than 50Kg/h.

Specifications and maintenance of small plastic extruders

Specifications

  • Voltage: Small plastic extruders typically operate at 220V and can also work at 110V.
  • The capacity: The capacity of small plastic extruders is usually expressed in kilograms per hour. For example, an extruder might have a capacity of 20-40kg/h, which means it can process 20 to 40 kilograms of plastic material per hour.
  • Temperature: Small plastic extruders are fitted with multiple heating and cooling units. Each barrel section can be designed to heat up to 200-220°C. Five or more temperature control zones are often available to ensure the precision of product molding. The nozzle temperature can reach 250-280°C, while the die heats up to 200-260°C. Overall, the temperature of a small plastic extruder can reach 200-280°C.
  • Power: The power of small plastic extruders is usually expressed in kilowatts (kw). For example, some models have a power of 7.5kw, while others have a power of 11kw. This means that the power of the small plastic extruder can provide stronger extrusion pressure and processing power.
  • The length-to-diameter ratio of the barrel: The length-to-diameter ratio of small plastic extruder barrels determines mixing and melting functions. For example, some models have a length-to-diameter ratio of 25:1, while others achieve 33:1. The longer the length-to-diameter ratio, the better the melting and mixing effects of the plastics.

Maintenance

  • Cleaning: Regularly clean the feeding ports, outlets, barrels, screws, and other parts of the extruder to remove residue and impurities. This ensures product quality and equipment performance.
  • Lubrication: Apply lubricating oil to the extrusion machine's movable parts, such as bearings and gear transmission, to ensure fluent operation and reduce wear and tear.
  • Inspection: Schedule inspections periodically, checking for loose and worn parts, replacing and tightening them as necessary. Also, check the hydraulic system and electric circuits to avoid potential safety hazards.
  • Cooling system maintenance: Ensure that the cooling system works well by checking coolant levels and pumps and cleaning cooling fins and radiators to prevent overheating and damage to the equipment.
  • Maintaining a clean working environment: Keep the work site of the extruder clean and tidy, ensuring that the surroundings are well-ventilated and free from flammable and explosive materials to reduce the risk of fire and safety accidents.

Usage scenarios of small plastic extruders

Small plastic extruders are versatile pieces of machinery with various applications in different industries.

  • Food industry packaging: According to research, food packaging accounts for 66% of the plastic extrusion industry. Small plastic extruders create packaging for fresh food items, dairy products, frozen foods, and more. Also, the protective casing for medical equipment and pills is made using small plastic extruders.
  • Custom plastic products: Unlike large-scale extruders, small models can efficiently produce custom plastic items. Plastics such as PVC, PS, and PP are used to create specialty products with unique designs. These include nonstandard shapes such as sign holders, corner protectors, binders, and many more.
  • Automotive components: In the automotive industry, plastic extruders are used to produce various interior and exterior automotive parts. Trim pieces, weather seals, gaskets, internal components, underbody panels, and many have been produced using Plastic extrusion. The durable, lightweight, and versatile nature of plastics makes them ideal for automotive manufacturers.
  • Construction: The construction industry has continually used small plastic extruders to make various building and construction materials. Plastic is a strong and lightweight material, making it suitable for numerous construction applications. This includes windows, hollow structural shapes, doors, roofing, tubing, trim, and other custom shapes.
  • Textile industry: In the textile industry, small extruders make synthetic fibers such as nylon, polyester, and polypropylene. These fibers are used in various products, including clothing, upholstery, carpets, and industrial fabrics.
  • Consumer goods and small electronics: Many consumer products are manufactured using small plastic extruders. Items such as hairbrushes, toys, plastic bottles, phone cases, sneaker soles, small appliance housings, and many more are made using this piece of machinery. Also, the small plastic extruder can create components used in electronic devices, including housings, connectors, switches, and insulating parts. Precision, quality, and accuracy are required when making these electronic components, making the small plastic extruder ideal for the job.

How to choose small plastic extruders

When choosing an extruder for small plastic products, several factors should be considered to ensure that the right machine is selected for the intended application.

  • Production demand

    Users' production demand is a key factor in selecting a small plastic extruder. Based on the user's production demand, a plastic extruder with the appropriate processing capacity is chosen. If the production demand is high, a small extruder with a large output is selected, and if the production demand is small, a small extruder can also meet it.

  • Materials handled

    The type, shape, and size of the material also affect the choice of plastic extruder. If the material is a powder, a small plastic extruder with a feeder equipped with a feeder is required. If the material is PS plastic pellets, PVC plastic pellets, etc., a specialized small PS extruder for PVC should be selected.

  • Product structure and complexity

    The structure and complexity of the products to be manufactured also influence the selection of the model. If the product requires high precision and complicado structure, it is necessary to choose a small extruder that matches the mold and can control temperature and pressure with precision.

  • Space limitations

    Space limitations are also an important factor in choosing a small plastic extruder. If the space is limited, a compact design and structure of the extruder must be selected to enable proper placement and installation in the available space.

FAQ

Q1: How does an extruder work?

A1: The working principle of small plastic extruders can be briefly described in three steps: feeding, melting & mixing, and forming.

Firstly, raw materials are fed into the hopper and then conveyed by the screw to different sections through the enhanced rotation of the screw. The second section is the melting zone, where the temperature is raised, and solid raw materials become molten plastic. In the last section of the barrel, the molten plastic is pushed to the die. During the movement in the barrel, raw materials are also mixed with additives. This situation is called melting and mixing.

Finally, molten plastic is shaped into different forms with the help of a die.

Q2: What are the two types of extrusion processes?

A2: There are two main types of extrusion processes: hot and cold extrusion. A hot small plastic extruder applies heat and pressure to transform the material into desired shapes. This is widely used in plastics. Cold extrusion is usually applied to metals like zinc, aluminum, copper, and alloys. It's used to manufacture metal products without the application of heat.

Q3: What are the advantages of plastic extrusion?

A3: Plastic extrusion is capable of producing high volumes of plastic to create consistent products. Furthermore, its production speed is very high. Once a die is made, the time taken to produce the product is much shorter compared to other methods. This helps to lower production costs. Plastic extrusion is also waste reduction. Scrap plastic left over can be reintroduced to the process.

Q4: What are the applications of plastic extrusion?

A4: The small plastic extruder machine creates products used in daily life. This includes window frames and weather stripping. It can also be used to make a medical catheter. In addition, wires and cables in different colors are also produced through plastic extrusion.

X