Plastic table & chair & stool injection moulds are specialized tool used in the injection molding process to manufacture plastic tables of various shapes and sizes. These moulds determines the table & chair & stool's design, dimensions, and surface finish.
Common mould steel types for plastic table & chair & stool injection moulds
*P20 mould steel
HRC 28-32, pre-hardened steel, easy to machine, durable for medium-volume production, suitable for medium to large plastic tables & chairs; cost-effective choice
*718H mould steel
HRC 33-38, pre-hardened steel, improved compared to P20, corrosion-resistant for plastic materials with additives, suitable for higher production cycles; common for chair and stool moulds requiring better surface finish and strength.
*H13 mould steel
HRC 42-48(after heat treatment), heat-resistant and wear-resistant tool steel, with high strength and toughness. Long mould life, especially for high-volume production, ideal for moulds with high-temperature processing or abrasive materials.
*S136 mould steel (or 420 stainles steel)
HRC 48-52, with excellent corrosion resistance, making moulds for outdoor furniture, where a high-gloss finish and corrosion resistance are essential. Excellent surface finish for transparent or glossy plastic table & chair & stool.
*NAK80 mould steel
HRC 38-43, pre-hardened steel with high machinability, suitable for complex designs or moulds requiring high polish.
Criteria for choosing mould steel
1. Product requirements
*For basic designs: use cost-effective steels like P20
*For high-gloss finishes: use S136 or 718H
*For abrasive materials: use H13
2. Production volume
*Low-to-medium production: P20 or 718H
*High-volume production: H13 or S136
3. Corrosion resistance
*If working with corrosive plastics (e.g., containing glass fibers), S136 is a better choice
4. Mould complexity
*For detailed designs and textures, steels like NAK80 or S136 perform better due to their excellent machinability and polishability
5. Budget
*P20 and 718H are more affordable but may need more frequent maintenance compared to H13 or S136
Factors to consider when designing a plastic table & chair & stool injection moulds
1. Product design: size, weight, and functionality of the table
2. Cycle time: optimizing mould design for faster production
3. Material shrinkage: accounting for the plastic's shrinkage rate during cooling
4. Mould maintenance: ensuring long-term use with regular cleaning and maintenance
Injection molding process for plastic table & chair & stool
1. Plastic material selection
Common materials: PP (Polypropylene), HDPE (High-Density Polyethylene), or ABS.
The material is chosen based on durability, flexibility, and UV resistance for outdoor tables & chairs & stools.
2. Mould setup
The mould is mounted onto the injection molding machine.
3. Plastic injection
Molten plastic is injected into the mould cavity under high pressure.
4. Cooling
The plastic cools and solidifies inside the mould.
5. Ejection
The finished plastic table or table or stool parts are ejected from the mould.
6. Post-processing
Trimming, painting, or assembly (if multiple parts are molded).