To make the plastic, it need through injection molding technology, melt plastic material injected into a designed mold to form the finished plastic basin.

 

To produce a plastic basin, the injection molding machine first takes plastic pellets from a hopper. The barrel melts the material and the screw injects it into a closed basin mold. After cooling, the mold opens and the machine ejects the finished basin. The entire cycle takes about 15-30 seconds per batch, depending on the basin size and the mold’s cavity count.

Select the Right Plastic Material for Plastic Basin

• Material options: PP vs. PC

• Key properties for basin applications

• Drying requirements

Material options

PP vs. PC:Polypropylene (PP) is the standard choice for most household basins. It offers good impact resistance, strong mechanical properties, and resistance to acids and alkalis. For premium basins, manufacturers choose polycarbonate (PC) because it provides high transparency and hardness, giving a glass-like appearance.

Key properties for plastic basin applications

With different basin material, PP has a density of 0.89-0.91 g/cm³ and melts at 200-230°C. It is lightweight and does not absorb much moisture. PC has a higher density and requires melt temperatures of 260-300°C. The material choice directly affects the basin’s strength, surface finish, and durability. PP basins resist cracking, while PC basins offer superior clarity and impact strength.

Material dry requirements

To make a better quality plastic basin, material need to dry firstly. PC absorbs moisture from the air, which can cause surface defects. A hopper dryer removes this moisture before processing. PC typically needs drying at 120°C for 3-4 hours. PP is less sensitive but benefits from brief drying at 80-90°C for 2 hours.

Match Injection Molding Machine Configuration for plastic Basin

• Machine types and clamping force

• Key parameters for basin production

• Haichen machine features

Machine types and clamping force

Horizontal injection molding machines are the standard for basin production. The clamping force must keep the mold shut during injection. For standard household basins, machines with clamping force from 120 to 300 tons are typically sufficient. Multi-cavity molds require higher tonnage. And with over 10years rich experience, we will intruct you how to choose the right injection molding machine for large plastic basins.

Key parameters for basin production

When configuring a basin making machine, focus on clamping force, injection volume, tie-bar spacing, and platen size. The clamping force must resist the plastic injection pressure. Injection volume determines how much plastic the machine can push per cycle. Tie-bar spacing and platen size affect the maximum mold dimensions the machine can accommodate.

Haichen machine features

Haichen offers the HCK series machines with precise temperature control for PP and PC. The closed-loop servo control maintains consistent injection speed and pressure, ensuring uniform wall thickness. Servo motors reduce power consumption by 30-50% compared to standard hydraulic machines. And here is comparision of servo hydraulic vs all electric machine for large plastic basin production

Design Plastic Basin Mold

• Mold materials and manufacturing

• Multi-cavity layout and balancing

• Cooling system design

Mold materials and manufacturing

Basin molds are made from tool steel grades like P20, 718, H13, or S136. P20 steel offers good durability at lower cost for medium-volume production. H13 and S136 provide better heat and wear resistance for high-volume runs. The mold surface receives a mirror polish or texture finish based on the basin’s appearance requirements.

Multi-cavity layout and balancing

Basin molds often use multi-cavity designs to increase output. A 4-cavity mold produces four basins per cycle, while some molds use 8 or more cavities. The cavity layout must balance plastic flow evenly to all cavities. Unbalanced flow leads to inconsistent quality. Hot runner systems keep the plastic molten as it travels, reducing material waste.

Cooling system design

The mold includes cooling channels that circulate water to remove heat. Uniform cooling prevents warping and ensures dimensional stability. For thin-walled basins, efficient cooling is critical. The design must place cooling lines close to the cavity surface for rapid heat removal. This also shortens the cycle time.

Auxiliary Systems Improve plastic Basin production

• Material handling and feeding

• Temperature control units

• Quality and efficiency considerations

Material handling and feeding

An auto loader feeds plastic pellets from a storage container into the machine’s hopper. This eliminates manual handling and ensures consistent feed rates. Some systems include a vacuum loader that pulls pellets through sealed pipes, keeping them clean and dry. For basin production, the loader can be programmed to deliver specific amounts per cycle.

Temperature control units

A chiller provides cooled water to the mold’s cooling channels at 7-30°C. Consistent water temperature ensures uniform cooling, which reduces cycle time and prevents warping. For multi-cavity basin molds, a chiller with higher flow capacity is necessary. Some facilities also use mold temperature controllers for precise surface finishing.

Quality and efficiency considerations

The finished basin must have consistent wall thickness, smooth surfaces, and no defects like sink marks or flow lines. The machine’s control system monitors temperature, pressure, and timing. Operators can save parameter sets for different basin designs, making switching between products quick and easy. Proper drying and cooling are essential for high-quality output.

Haichen Machinery’s Plastic Basin Production Solutions

• Complete production line integration

• Technical support and services

Complete production line integration

Haichen Machinery provides complete solutions for plastic basin production. Our offering includes the HCK series injection molding machines, mold recommendations, and auxiliary equipment like dryers, auto loaders, and chillers. We help customers select the right machine based on basin size, weight, cavity count, and what materials are used in basin injection molding. All our machines feature energy-saving servo systems.

Technical support and services

Haichen provides basin production line planning and technical support. We analyze your basin design and recommend the right machine configuration. Our team helps you from select plastic basin injection molding matrial and choose the correct screw and barrel for your material. We also provide mold trial services before shipping to ensure compatibility. Meanwhile, if you meet any machine technical problems, we will instruct about large plastic basin clamping unit troubleshooting and solution guide. With over ten years of experience, Haichen supports customers from material selection to full production.

Contact us to discuss your basin production needs.

 

Haichen Machinery provides complete basin injection molding production solutions from machine selection to operator training. Welcome contact us to discuss your plastic basin production needs.