Plastic chair making machine is injection molding machine.
This is the most commonly used manufacturing equipment for plastic chairs and is suitable for large-scale production.
The injection molding machine forms the various components of the chair by injecting molten plastic into the mold.
The features of injection molding machines include long-term stable operation, quick mold changing, low waste output and automation compatibility.
The main components of plastic chair making machine
- Injection system
- Mold clamping system
- Hydraulic system
- Electrical control system
- Heating/cooling system
- Safety devices
Injection system
Responsible for heating and melting plastic particles and injecting them into the mold cavity.
It is composed of a hopper, a barrel, a screw, a heater, a nozzle, etc.
Mold clamping system
It is used to fix the mold and provide clamping force to prevent the leakage of molten plastic during the injection process.
Including the formwork, the clamping cylinder, the ejection device, etc.
Hydraulic system
Provides power to drive injection and mold closing actions.
It is mainly composed of a hydraulic pump, a hydraulic motor, an accumulator, a cooler, hydraulic pipelines, etc.
Electrical control system
Controls and monitors parameters of the injection molding process, such as temperature, pressure, injection speed, etc.
Including control panels, sensors, actuators, etc.
Heating/cooling system
The heating system maintains barrel and nozzle temperature, while simultaneously, the cooling system regulates mold temperature to ensure stable plastic fluidity.
Safety devices
Including emergency stop buttons, overload protection, over-temperature alarm, etc., are used to ensure the safety of operators.
Auxiliary systems, such as lubrication systems and exhaust systems.
Are used to ensure the smooth progress of the injection molding process.
Raw materials suitable for plastic chair making machine
- Polypropylene (PP)
- Polyethylene (PE)
- Polycarbonate (PC)
- Polyvinyl chloride (PVC)
- Acrylonitrile Butadiene Styrene (ABS)
- Nylon (PA)
- Glass fiber reinforced plastic (GRP)
- Recycled plastic
Polypropylene (PP)
This semi-crystalline thermoplastic exhibits exceptional impact resistance, mechanical strength.
And corrosion resistance; consequently, it serves well for manufacturing plastic chairs
The surface of the PP plastic chair is smooth and easy to clean, making it suitable for both indoor and outdoor use.
Polyethylene (PE)
Polyethylene also has high strength and rigidity, but it is softer and more prone to deformation than polypropylene.
It is usually used indoors and has a relatively low price.
Polyvinyl chloride (PVC)
PVC plastic chairs are softer and more elastic than PP, resistant to ultraviolet rays and oxidation, and are suitable for lightweight chair designs.
Polycarbonate (PC)
Chairs made of polycarbonate are relatively sturdy and durable.
With a transparent appearance and UV resistance, they are suitable for both outdoor and indoor use.
ABS resin
ABS resin serves as a widely adopted engineering plastic, offering excellent impact resistance.
Furthermore, it exhibits remarkable heat resistance, low-temperature tolerance, chemical stability, and superior electrical properties.
It is suitable for applications in machinery, automobiles, electronic appliances and other fields.
Nylon (PA)
Nylon has excellent comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication.
It is suitable for filling and reinforcing modification to improve performance and expand application range.
Glass fiber reinforced plastic (GRP)
Composed of glass fiber and unsaturated polyester resin, this material features high strength and durability.
Furthermore, it serves public and office furniture applications.
Recycled plastic
Some plastic chairs may be made from recycled waste plastic through secondary processing.
But this material has poor strength, a dark color, is opaque and has a rough appearance.
It is recommended to avoid purchasing it.
Price of plastic chair molding machine
PC crystal chair injection molding machine
Haichen injection molding 1200T plastic chair injection molding machine FOB Ningbo priced at USD 178,000.
PP chair with arm injection molding machine
Haichen 700 ton FOB Ningbo priced at USD 100,000 -USD 125,000.
In addition, according to different needs and configurations.
The price of injection molding machines can range from tens of thousands to several million yuan.
The price range of plastic chair injection molding machines is very wide,
and the specific price needs to be determined according to the specific model and configuration.
How to choose automatic plastic chair making machine?
Size of plastic chair
The first step of the matching machine is to confirm the size of the chair, because the mould is to be placed in the injection molding machine for production.
So the size of the mould can not exceed the spacing of the injection molding machine tie rod.
Otherwise the mould can not be placed in the injection molding machine, and the production cannot be carried out.
And the size of the mould is not equal to the size of the chair.
According to the actual situation, the length, width and height of the mould will be tens of centimeters larger than the length, width and height of the chair.
Mobility of raw materials
In addition to the size of the chair, the most important aspect of the selection of the injection molding machine is the fluidity of the material.
Let’s use two chairs of different materials but both same size.
The first one is a chair made of PE material, and the second is a chair made of PC material.
In practical applications, PP is the most conventional material, and PC material has fast fluidity but is easier to solidify.
So it requires a larger injection rate and pressure to inject.
So it will also need a larger clamping force to cooperate to ensure that the product will not produce flash.
Therefore, in the production of 556x543x800mm plastic chair, we choose HCK700.
PC has high transparency and high hardness of the finished product, and in the case of the same size, we will need HCK1000 to produce PC seats.
Plastic chair mold back plate – a faster production method
If the backrest of this plastic chair has many different patterns.
In actual production, we can design detachable metal plates separately for these back plates.
In this way, manufacturers do not need to purchase the entire mold separately for each chair with a different backrest.
They only need to replace their backsplash to get a different chair.
Since plastic chairs are large-volume plastic products, unlike small-volume ones, multi-cavity molds can be used.
Therefore, each injection molding machine can only be equipped with one cavity mold to produce one chair within one cycle.
Manufacturers can select machines based on their actual situations.
Please tell us your requirements and we will customize a solution for you based on your needs.
