Yige Molds: Professional Injection Molding Solution for Wheeled Trash Cans

I. Product Definition and Market Positioning

Wheeled trash can molds produced by Yige Molds are specialized injection molds used for manufacturing mobile trash cans with wheels installed at the bottom. These molds must meet both the structural strength requirements of the trash can body and the precision fitting requirements for wheel installation. They are widely used in scenarios such as household kitchens, commercial establishments, and sanitation facilities. With the ongoing advancement of waste sorting policies and the increasing demand for mobility convenience, the wheeled trash can market is exhibiting trends towards diversification of capacities and functional integration.

II. Core Technical Features

1. Wheel Installation Structure Design

Yige Molds employs a four-corner wheel positioning system at the base, realized through precision slider mechanisms to form the wheel mounting positions. The wheel axle hole diameter tolerance is controlled within ±0.05mm, ensuring flexible and smooth wheel rotation without jamming after installation. The mold design reserves slots for anti-slip wear-resistant studs, adding 4-5 steel wear-resistant studs to the bottom to extend the trash can's service life.

2. Body Structure Optimization

A tapered body design is used, where the top opening diameter is 15-25% larger than the bottom opening, facilitating waste disposal and demolding. The body wall thickness is 2.5-4.0mm, with reinforcing ribs ensuring structural strength and a load-bearing capacity ≥150kg. The bottom features a concave arc design to reduce impact forces on the bin base. A clearance of approximately 2cm is maintained between the bottom and the ground, avoiding direct contact and wear.

3. Sealing and Odor Control System

The lid utilizes a domed sealing structure, with a fit clearance of ≤0.5mm against the body. The built-in sealing ring is formed via secondary injection molding with TPE material, with a compression of 15-20%, effectively preventing odor leakage. The lid opening angle is ≥70°, conforming to ergonomic principles, allowing for easy and effortless operation via foot pedal or manual action.

III. Materials and Process Standards

1. Mold Steel Configuration

2. Plastic Material Selection

• Main Body Material: PP-T20/T30 (20-30% talc filled), impact-resistant and aging-resistant.

• Wheel Material: HDPE (High-Density Polyethylene), good wear resistance and low noise.

• Sealing Material: TPE-S (Shore hardness 60-70A), good elasticity and aging resistance.

• Handle Material: ABS+PC alloy, high strength and comfortable grip.

3. Injection Molding Process Parameters

Melt Temperature: PP 200-230°C, ABS 240-260°C
Mold Temperature: 40-60°C (PP), 60-80°C (ABS)
Injection Pressure: 80-120 MPa
Holding Pressure: 50-80 MPa
Cooling Time: Wall thickness × 1.5-2 seconds/mm
Molding Cycle: 45-90 seconds/cycle

IV. Structural Design Features

1. Wheel System Design

Wheels feature a composite structure of rubber outer tire and polyethylene inner wheel, with a diameter of 190-200mm and a tread width ≥35mm. The wheel axles are made from solid 45# medium carbon steel, surface treated with zinc plating for rust prevention, with a rust-proof duration ≥3 years. Wheels and base axles use a direct-insertion, non-retreating, anti-theft connection, with a single-wheel load capacity ≥50kg.

2. Handle and Lifting Lug Design

Ergonomic handles are positioned on both sides of the body, with a width of 150-180mm for easy two-handed grip. Lifting lugs use a reinforced rib structure, with a thickness ≥8mm, width ≥60mm, and height ≥55mm, increasing carrying capacity to ≥150kg. The connection between handles and the body features an anti-slip design to ensure safe handling.

3. Bottom Wear-Resistance Design

4-5 stainless steel wear-resistant studs are installed on the bottom, with a diameter ≥6mm and height of 2-3mm. The studs are fixed using a hot-press embedding process, ensuring firm bonding with the body, reducing bottom wear and extending service life. A drainage port is designed at the bottom to facilitate cleaning and rainwater drainage.

V. Quality Control Standards

1. Dimensional Accuracy Control

• Body Dimension Tolerance: ±0.3mm/100mm

• Wheel Axle Hole Concentricity: ≤0.15mm

• Wall Thickness Uniformity: ±0.1mm

• Flatness Error: ≤0.2mm/300mm

• Surface Roughness: Ra ≤ 0.8μm

2. Functional Performance Testing

• Load-Bearing Test: No breakage after dropping from 1.2m height under full load.

• Wheel Life Test: No damage after 100,000 rolling cycles.

• Sealing Test: Holds 0.5kPa air pressure for 30 seconds without leakage.

• Environmental Test: Temperature shock from -30°C to 60°C, normal function.

• Opening/Closing Life Test: 50,000 cycles without failure.

VI. Mold Manufacturing Process Flow

1. Design and Development Phase

Requirement Analysis → 3D Modeling → Mold Flow Analysis → Mold Structure Design
    ↓
Material Procurement → CNC Rough Machining → Heat Treatment → CNC Finish Machining
    ↓
EDM Machining → Wire-Cut EDM → Polishing → Assembly & Debugging
    ↓
Trial Molding → Mold Modification → Final Inspection → Mass Production

2. Key Process Control

• Hot Runner System: Employs multi-point hot nozzles for balanced gating, ensuring uniform melt filling.

• Cooling System: Conformal cooling channel design, cooling uniformity within ±2°C.

• Venting System: Vents placed at melt flow ends, vent depth 0.02-0.03mm.

• Ejection System: Combined use of ejector pins and slides ensures damage-free part ejection.

VII. Product Specification Series

VIII. Yige Molds Service Advantages

1. Technical R&D Capability

Yige Molds has a professional technical R&D team with independent design and development capabilities, able to provide customized solutions according to client requirements. The company is equipped with advanced CAD/CAE/CAM software systems, offering integrated services for mold design, simulation analysis, and manufacturing.

2. Production Manufacturing Capability

Yige Molds is equipped with advanced machinery including CNC machining centers, EDM machines, and wire-cutting machines, capable of producing high-precision mold components. The company has a comprehensive quality management system to ensure process control during mold manufacturing and product quality stability.

3. After-Sales Service Assurance

Yige Molds provides comprehensive after-sales service, including mold installation and debugging, operation training, and technical consultation. The company has established a customer file management system, conducts regular follow-ups, and promptly resolves issues encountered during production.

IX. Economic Benefit Analysis

1. Manufacturing Cost Composition

Mold Cost: 40-50% (Steel, Machining, Design)
Material Cost: 25-30% (Plastic Resin, Accessories)
Processing Cost: 15-20% (Injection Molding, Assembly)
Quality Control: 5-10% (Inspection, Testing)

2. Production Efficiency Indicators

• Molding Cycle: 45-90 seconds/cycle

• Equipment Utilization Rate: ≥85%

• Qualification Rate: ≥98.5%

• Mold Change Time: ≤30 minutes

• Mold Life: 800,000 - 1,000,000 cycles

X. Market Application Prospects

Wheeled trash can molds produced by Yige Molds have broad market prospects, primarily applied in:

1. Household Scenarios: Kitchens, living rooms, bathrooms, etc., capacities 20-45L.

2. Commercial Establishments: Restaurants, hotels, shopping malls, etc., capacities 50-120L.

3. Sanitation Facilities: Streets, parks, residential complexes, etc., capacities 240-660L.

4. Industrial Areas: Factories, warehouses, etc., capacities 1100L and above.

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Through systematic design philosophy, advanced manufacturing processes, and a comprehensive quality control system, Yige Molds provides clients with high-quality wheeled trash can mold solutions. We are committed to continuous improvement and innovation to create greater value for our clients.