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YIXUN mold
8480419090
Definition: An injection mold with no less than 2 cavities, capable of producing multiple identical plastic parts simultaneously in one injection cycle. The number of cavities is commonly 8, 16, or 32, and can be as high as 128.
Core Advantages:
Efficiency Multiplication: Taking a 1-out-of-32 cavity preform mold as an example, the daily output is increased by more than 30 times compared with a single-cavity mold.
Cost Optimization: It allocates the mold depreciation and energy consumption costs, reducing the unit production cost of plastic parts by 15%-40%.
Precision Control: Achieves filling balance in each cavity through CAE mold flow analysis, and the dimensional tolerance deviation can be controlled within ±0.02mm.
Typical Applications: Small and medium-sized batch plastic parts such as bottle caps, preforms, and electronic connectors.
Process Principle: High-pressure nitrogen is injected into the molten plastic to form a hollow runner and push the melt to fill, enabling the molding of complex structures with uneven wall thickness (the maximum difference can reach 10:1).
Technical Value:
Defect Elimination: Solves the problems of shrinkage marks and warpage of large plastic parts. For example, the surface qualification rate of automobile bumpers is increased from 75% to 98%.
Material Saving: The hollow structure reduces plastic usage by 15%-30%, and no subsequent drilling process is required.
Cycle Shortening: Reduces the cooling time by 20%-50%, especially suitable for engineering plastics such as PA66+GF.
Representative Cases: Curved decorative parts of automobile interiors, handles of home appliances, and large bathroom components.
| Dimension | Hot Runner System | Cold Runner System |
| Structural Features | The runner is continuously heated, and the plastic remains in a molten state. | The runner has no heating, and the plastic parts are cooled together with the gate. |
| Material Loss | No sprue scrap, 100% material utilization. | The sprue accounts for 10%-30%, which needs to be recycled and crushed. |
| Molding Cycle | Shortened by 20%-30% (e.g., from 21s to 16s). | Longer cycle, restricted by gate cooling. |
| Initial Cost | Higher (about 80,000 yuan per set). | Lower (about 1/3 - 1/5 of that of hot runner). |
| Applicable Scenarios | Mass-produced precision plastic parts (automotive, medical). | Small-batch, multi-variety plastic parts (daily necessities, toys). |
High-Efficiency Mass Production Combination: Multi-cavity + hot runner + gas-assisted technology. For example, the 1-out-of-128 cavity cosmetic packaging mold of Yifeng Hot Runner, combined with needle valve hot runner and gas-assisted molding, has a daily output exceeding 100,000 pieces.
Cost-Balanced Combination: Medium cavity (8-16 cavities) + cold runner, suitable for small and medium-sized batch plastic parts, with controllable initial investment and simple maintenance.
Output Threshold: When the annual production capacity exceeds 1 million mold cycles, the cost advantage of hot runner molds begins to be prominent, and the initial investment can be recovered in 67 days.
Plastic Part Characteristics: When the wall thickness difference is >3mm or the surface area is >0.5㎡, gas-assisted molding is preferred; when the precision requirement is <0.05mm, a needle valve hot runner needs to be matched.
Material Type: For corrosive materials such as PVC and POM, corrosion-resistant hot nozzles (such as tungsten steel copper sleeve structure) should be selected; for high-temperature materials, heaters with temperature resistance above 300℃ should be matched.
Definition: An injection mold with no less than 2 cavities, capable of producing multiple identical plastic parts simultaneously in one injection cycle. The number of cavities is commonly 8, 16, or 32, and can be as high as 128.
Core Advantages:
Efficiency Multiplication: Taking a 1-out-of-32 cavity preform mold as an example, the daily output is increased by more than 30 times compared with a single-cavity mold.
Cost Optimization: It allocates the mold depreciation and energy consumption costs, reducing the unit production cost of plastic parts by 15%-40%.
Precision Control: Achieves filling balance in each cavity through CAE mold flow analysis, and the dimensional tolerance deviation can be controlled within ±0.02mm.
Typical Applications: Small and medium-sized batch plastic parts such as bottle caps, preforms, and electronic connectors.
Process Principle: High-pressure nitrogen is injected into the molten plastic to form a hollow runner and push the melt to fill, enabling the molding of complex structures with uneven wall thickness (the maximum difference can reach 10:1).
Technical Value:
Defect Elimination: Solves the problems of shrinkage marks and warpage of large plastic parts. For example, the surface qualification rate of automobile bumpers is increased from 75% to 98%.
Material Saving: The hollow structure reduces plastic usage by 15%-30%, and no subsequent drilling process is required.
Cycle Shortening: Reduces the cooling time by 20%-50%, especially suitable for engineering plastics such as PA66+GF.
Representative Cases: Curved decorative parts of automobile interiors, handles of home appliances, and large bathroom components.
| Dimension | Hot Runner System | Cold Runner System |
| Structural Features | The runner is continuously heated, and the plastic remains in a molten state. | The runner has no heating, and the plastic parts are cooled together with the gate. |
| Material Loss | No sprue scrap, 100% material utilization. | The sprue accounts for 10%-30%, which needs to be recycled and crushed. |
| Molding Cycle | Shortened by 20%-30% (e.g., from 21s to 16s). | Longer cycle, restricted by gate cooling. |
| Initial Cost | Higher (about 80,000 yuan per set). | Lower (about 1/3 - 1/5 of that of hot runner). |
| Applicable Scenarios | Mass-produced precision plastic parts (automotive, medical). | Small-batch, multi-variety plastic parts (daily necessities, toys). |
High-Efficiency Mass Production Combination: Multi-cavity + hot runner + gas-assisted technology. For example, the 1-out-of-128 cavity cosmetic packaging mold of Yifeng Hot Runner, combined with needle valve hot runner and gas-assisted molding, has a daily output exceeding 100,000 pieces.
Cost-Balanced Combination: Medium cavity (8-16 cavities) + cold runner, suitable for small and medium-sized batch plastic parts, with controllable initial investment and simple maintenance.
Output Threshold: When the annual production capacity exceeds 1 million mold cycles, the cost advantage of hot runner molds begins to be prominent, and the initial investment can be recovered in 67 days.
Plastic Part Characteristics: When the wall thickness difference is >3mm or the surface area is >0.5㎡, gas-assisted molding is preferred; when the precision requirement is <0.05mm, a needle valve hot runner needs to be matched.
Material Type: For corrosive materials such as PVC and POM, corrosion-resistant hot nozzles (such as tungsten steel copper sleeve structure) should be selected; for high-temperature materials, heaters with temperature resistance above 300℃ should be matched.
