6 septs to produce the plastic chair:
There are lots different kinds of plastic chairs:
Different places will use different kinds of chairs. White Chiavari chair or crystal pc chair, will be used on the wedding party. Modern Tiffany Chiavari Chair is very popular for the wedding or dining.
There are a total of 6 steps for a chair production.
Different raw materials will produce different kinds of chairs.
The basic steps of chair mold design:
1. Plastic chair analysis: Firstly, a detailed analysis of the structure of the plastic chair is required to understand its geometric shape, dimensions, and appearance requirements.
2. Runner system design: Designing a pouring system is one of the key steps, which requires ensuring that the molten plastic can smoothly enter the mold cavity. The channels of the pouring system should be as short and straight as possible to reduce heat loss and pressure drop.
3. Structural design of the forming part: including the composition of the moving and fixed parts, ensuring that the mold can be accurately formed.
4. Ejection system design: Design an ejection system to ensure that the formed chair can be smoothly demolded.
5. Cooling system design: The design of the cooling system directly affects the molding time and needs to be optimized based on the thickness and material characteristics of the chair.
6. Consider the parameters of the injection molding machine: The chair mold should follow the injection molding machine parameters to ensure the stable operation of the mold.
The injection molding machine will inject the melted material into the chair mold. Different materials will need different temperatures for the machine’s charging.
The PC chair material will need higher injection pressure, so the PC chair, acrylic chair, and Chiavari Chair must choose a 1000 tn injection molding machine. The outdoor chair just needs 700-800 tn machine.
Common plastic materials include polypropylene (PP), polyethylene (PE), polystyrene (PS), etc. The selection of these materials will affect the strength, durability, and appearance of the chair.
After injecting the material into the chair mold, we need to hold the pressure and start the cooling, otherwise, it may cause problems such as shrinkage, warping, internal stress, and even production interruption in the chair product.
The cooling time mainly depends on factors such as the plastic chair’s thickness, the plastic’s thermal and crystallization properties, and the chair mold temperature. Generally speaking, the cooling time should be between 30 and 120 seconds. Excessive cooling time not only reduces production efficiency but may also lead to difficulties in demolding.
After the chair cooled down. The chair mold open. The chair mold is complex, and the ejection is completed by a slider and some ejection pins in steps to de-mold the chair.
For the convenience of demolding the chair, we will invert the mold during production. This way, after being ejected, the plastic chair will automatically fall off due to the force of gravity. If removed with a robotic arm, the mold can be placed facing upwards normally.
Plastic chairs are normally unnecessary, but some PVC chairs or Acrylic chairs may need to be assembled the legs.
Especially to the Ergonomic Chair, Office chair, Executive Mesh Chair… We have to assemble the legs, arms, with other parts.
Choose Haichen as your injection molding machine Manufacturer for disposable cutlery. With years of experience and a commitment to quality, we have helped countless factories succeed through efficient and effective production.
Haichen can supply spoon injection molding machines, we would also like to share the information about :
Haichen PET injection molding machine suit for Plastic bottle preform.
The machine control is easy with 21 different languages on the control screen.
Haichen is a manufacturer of injection molding machines. We supply the PET machines from 160 ton to 560 ton. The clamping force is from 3300KN to 30000KN.
If the chair is without the arm, the mini machine is 600 ton.
We have to make sure if the chair mold can be laod into machine or not.
Haichen HCK 600 is the minimum machine for chair production.
The plastic chair production line will need some machines:
Some factories produce PET botlle that choose Haichen injection molding machines.
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“Innovation is at the core of Haichen’s DNA. Their state-of-the-art technology has given us a competitive edge. Their team’s expertise is second to none, and it shows in the performance of their injection molding machines.”
“Haichen’s injection molding machines have not only met but exceeded our expectations. Their support team is a real asset, always ready to assist. We’re proud to be part of Haichen’s success story.”
Haichen injection molding machine focuses on the global construction market and provides our clients with products suitable for the local market:.
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