The plastic chair injection molding machine is a injection molding machine that melts plastic and injects it into the chair mold to produce durable chairs.

A plastic chair injection molding machine has four core unit components. The injection unit melts the plastic and pushes it into the mold. The clamping unit holds the mold shut during injection. The hydraulic unit provides power for all moving parts. The electric and control system manages all actions and parameters. These four units work together to produce consistent, high-quality chairs. With different chair moulds, the plastic chair making machine can produce many different types of plastic chair. For example, plastic folding chair, plastic lawn chair, plastic outdoor chair, plastic rocking chair, outdoor plastic chair, chiavari chair​, plastic stacker chair, and childs plastic chair etc.

 

Plastic chairs are large products with complex shapes. A standard plastic chair weighs 1.5kg to 5kg. This requires the chair injection modling machine with high clamping force, typically 530to 1000 tons. The machine also needs a large platen to accommodate big molds. Special screw designs ensure even melting of the large plastic volume. Haichen , as one of Chinese plastic chair injection molding machine manufacturer know theplastic chair injection molding process  . And we understand during plastic chair injection molding process without such these machine features,  the chair may have weak spots or surface defects. 

 

HCK1000 PLASTIC INJECTION MOLDING MACHINE
INJECTION UNIT
ITEM	UNIT	A	B	C	D
INJECTION UNIT
Screw diameter	mm	95	105	115	125
Screw L/D ratio	L/D	24.3	22.0	20.1	18.5
Shot volume(theoretical)	cm3	3719	4543	5450	6438
Injiection weight(ps)	g	3384	4134	4959	5859
	oz	119.4	145.8	174.9	206.7
Injection pressure	Bar	2090	1710	1430	1210
Injection rate	cm3/s	778	950	1140	1346
Plasticizing capacity	g/s	100	127	150	177
Screw speed （Max.)	r/min	120
CLAMPING UNIT
Clamping force	Kn	10000
Space between tie bars(W×H)	mm	1120×1080
Platens size	mm	1675×1625
Opening stroke	mm	1100
Min.Mold height	mm	500
Max.Mold height	mm	1100
Distance between platens(daylight)	mm	2200
Ejector stroke	mm	325
Ejector force	Kn	230
OTHERS
Systerm pressure	Bar	160
Pump motor	Kw	60+70
Heating power	Kw	70.0
Oiltank cubage	L	1000
Machine dimension(L×W×H)	m	11.7*2.5*2.5
Machine weight	t	45.0
All above technical parameters are subject to change without prior notice.

Plastic Chair Injection Molding Machine Components

• Clamping unit

• Injection unit

• Hydraulic unit

• Electric and control system

 

Clamping unit

The clamping unit holds the mold shut during injection. This unit must provide enough force to resist the high pressure of the injected plastic.

For chair production, skilled plastic chair injection molding machine manufacturer like Haichen, know the typical clamping force ranges from 530 to 1000 tons. Insufficient force causes the mold to open slightly. This creates flash on the chair edges. The clamping unit also opens the mold after the cooling stage. An ejection mechanism then pushes the finished chair out. Haichen machines use a five-point toggle clamping system for stable force distribution.

Injection unit

The injection unit melts the plastic and injects it into the mold. A hopper feeds plastic pellets into a heated barrel. The barrel has heating bands that raise the temperature to 200-300°C. A screw rotates inside the barrel, pushing the plastic forward. The screw also creates friction that adds more heat.

Once enough melted plastic collects, the screw moves forward like a plunger. It pushes the melt through a nozzle into the mold. The injection unit also controls injection speed and pressure.

Hydraulic unit

The hydraulic unit provides power for the clamping and injection systems. It uses a hydraulic pump to generate high-pressure oil. This oil flows through valves to move the clamping cylinder and the injection screw. The hydraulic system must deliver consistent pressure for stable production.

For large chair making machines, the hydraulic unit requires a powerful pump. Haichen uses servo-driven hydraulic systems. These systems reduce energy consumption by 40-80% compared to standard fixed-pump systems.

Electric and control system

The control system manages all machine functions. It uses a programmable logic controller (PLC) to monitor temperature, pressure, timing, and position. Operators adjust parameters through a touch screen interface. The electrical system powers the heating bands, motors, and sensors. It also includes safety circuits that stop the machine when guards open.

A good control system allows operators to save parameter sets for different chair designs. This makes switching between products quick and easy.

Advantages Of Plastic Chair Injection Molding Machine

• High production efficiency

• Consistent product quality

• Energy saving operation

• Design flexibility

plastic chair

High production efficiency

A plastic chair making machine produces a complete chair in one cycle. Cycle times range from 50 to 120 seconds per chair. One machine can produce 300 to 700 chairs per day. The plastic chair injection molding process requires no secondary assembly for monobloc chairs. Automation reduces labor costs. Robots can remove finished chairs and place them on conveyors. This creates a continuous production flow.

Consistent product quality

The machine produces identical chairs cycle after cycle. The closed-loop control system maintains stable temperature and pressure. This prevents defects like short shots or warping. Each chair meets the same strength and appearance standards. The machine also monitors itself for problems. It alerts operators when parameters drift outside acceptable ranges. This reduces scrap rates and improves overall yield.

Energy saving operation

Modern plastic chair making machines use servo motor technology. The servo system only consumes power when needed. It stops the motor during cooling and other non-active periods. A standard fixed pump runs continuously, wasting energy. Servo machines save 40-80% on electricity. They also operate with less noise. This makes them suitable for clean, quiet workshop environments.

Design flexibility

One machine can produce different chair models by changing the mold. The control system stores multiple parameter sets. Operators can switch between chair designs quickly. The machine also processes various plastic materials. Common materials include PP, HDPE, and ABS. Each material has different strength and appearance properties. This flexibility allows plastic chair injection molding machine manufacturer to respond to market demands without buying new equipment.

Plastic Chair Injection Molding Machine Application

• Monobloc plastic chairs injection molding machine

• Stackable chairs injection molding machine 

Monobloc plastic chairs injection molding machine

Monobloc chairs are the most common product from these machines. The term monobloc means the chair comes as one single piece. There is no assembly required after molding. These chairs are lightweight and strong. Typical weight ranges from 1.5kg to 4kg. Monobloc chairs are popular for outdoor events, schools, and budget furniture markets. Like plastic outdoor chair injection molding machine. The machine produces them in one complete cycle, making it very efficient.

Stackable chairs injection molding machine 

Stackable chairs have a special design that allows multiple chairs to pile on top of each other. This saves storage space in restaurants, halls, and conference rooms. The mold for stackable chairs includes ribs and contours on the seat and back. These features guide the next chair into position. The injection unit must fill these thin features completely. A good clamping system prevents flash on these detailed areas. Stackable chairs usually weigh 2kg to 5kg.

On the market, you can find many Popular Plastic Chair Injection Molding Machine Manufacturer  , while when you have any plastic chair production demand, feel free to conact us.

We will not only instruct you how to choose plastic outdoor chair injectin modling machine and furthermore, supply suitable but not expensive plasic chair production line for you.