Pallet Mold Technical Specifications
I. Product Characteristics and Classification
1. Structural Type Classification
Type | Structural Features | Primary Use | Typical Dimensions | Weight Range |
|---|
Nine-block Type | Nine support feet on bottom | General warehousing | 1200×1000×150mm | 12-15kg |
Stringer Type | Three longitudinal beams | Heavy-duty transport | 1200×800×150mm | 10-13kg |
Block Type | Grid-pattern bottom | Light-duty warehousing | 1100×1100×150mm | 9-12kg |
Double-deck Type | Usable on both sides | Bidirectional operation | 1200×1000×150mm | 13-16kg |
II. Mold Structural Design
1. Load-bearing Structure Design
Deck System:
Surface thickness: 3.0-4.0mm
Reinforcement rib height: 6-10mm
Rib width: 3-5mm
Anti-slip structure: Round bumps or straight stripes
Support System:
Support foot wall thickness: 3.5-4.5mm
Internal reinforcement ribs: Radial layout
Corner transition: R8-R12 fillet
Forklift opening height: 90-110mm
2. Mold Technical Parameters
Mold Configuration Solution:├── Cavity Design│ ├── Standard pallet: 1x1│ ├── Small pallet: 1x2│ └── Mini pallet: 1x4├── Gating System│ ├── Hot runner points: 6-10 points│ ├── Gate type: Valve-gated│ └── Runner balance: Fill time difference ≤0.8 seconds├── Cooling System│ ├── Deck water channels: Ø12mm, spacing 80mm│ ├── Support foot water channels: Bubbler tube cooling│ └── Temperature control: Independent zoned control└── Ejection System ├── Ejector pin diameter: Ø6-Ø8mm ├── Ejector plate area: ≥60% of projected area └── Ejection speed: Adjustable
III. Materials and Processes
1. Material Selection
Material Type | Density | Melt Flow Rate | Tensile Strength | Flexural Modulus | Applicable Products |
|---|
HDPE | 0.95-0.96 | 5-10g/10min | ≥22MPa | ≥800MPa | General-purpose pallets |
Copolymer PP | 0.90-0.91 | 8-15g/10min | ≥25MPa | ≥1,200MPa | Export pallets |
PP+GF20 | 1.05-1.10 | 10-20g/10min | ≥35MPa | ≥2,000MPa | Heavy-duty pallets |
Food-grade HDPE | 0.95-0.96 | 5-10g/10min | ≥22MPa | ≥800MPa | Food pallets |
2. Injection Molding Parameters
Temperature Settings:
Pressure Parameters:
Injection pressure: 120-140MPa
Packing pressure: 100-120MPa
Clamping force: 1,800-2,500 tons
Time Control:
Injection time: 10-15 seconds
Packing time: 25-35 seconds
Cooling time: 45-60 seconds
Total cycle: 85-115 seconds
IV. Quality Control Points
1. Dimensional Inspection
Inspection Item | Measuring Tool | Tolerance Requirement | Inspection Frequency |
|---|
Length | Tape measure/CMM | ±2mm | Each batch |
Width | Tape measure/CMM | ±2mm | Each batch |
Height | Height gauge | ±1mm | Each batch |
Flatness | Surface plate + feeler gauge | ≤2mm/1000mm | Each batch |
Wall thickness | Ultrasonic thickness gauge | ±0.3mm | Every 4 hours |
2. Performance Testing
Static Load Test:
Dynamic Load Test:
Stacking Test:
V. Production Efficiency Control
1. Production Cycle
Product Type | Mold Configuration | Cycle Time | Daily Output | Yield Target |
|---|
Nine-block Pallet | 1x1 | 100-110 seconds | 780-860 pieces | ≥98% |
Stringer Pallet | 1x1 | 95-105 seconds | 820-900 pieces | ≥98% |
Block Pallet | 1x1 | 90-100 seconds | 860-950 pieces | ≥98.5% |
Small Pallet | 1x2 | 80-90 seconds | 1,900-2,100 pieces | ≥99% |
2. Energy Consumption Management
Power consumption: 1.1-1.3 kWh/kg
Cooling water usage: 2.5-3.5 m³/h
Compressed air: 0.4-0.6 m³/min
Hydraulic oil temperature: 40-50℃
VI. Mold Maintenance Specifications
1. Daily Maintenance
2. Periodic Maintenance
Maintenance Item | Maintenance Interval | Work Content | Standard Requirements |
|---|
Guide pins/bushings | 10,000 cycles | Clean and lubricate | Smooth sliding |
Ejection system | 20,000 cycles | Inspect and replace | Synchronized action |
Cooling system | 30,000 cycles | Clean and inspect | Flow rate meets standard |
Hot runner | 50,000 cycles | Temperature calibration | Temperature difference ≤3℃ |
Complete overhaul | 100,000 cycles | Accuracy restoration | Achieve 90% of original accuracy |
VII. Common Problem Handling
1. Molding Defect Countermeasures
Sink marks:
Warpage:
Short shot:
Sticking:
Reduce packing pressure
Extend cooling time
Improve draft angle
2. Mold Failure Handling
Hot runner failure:
Check heating elements
Test thermocouples
Clean runners
Ejection failure:
Cooling failure:
VIII. Application Technical Requirements
1. Usage Environment Adaptation
Temperature range: -20℃ to 60℃
Humidity range: 30-90% RH
Chemical environment: Resistant to common cleaning agents
Mechanical environment: Impact and wear resistant
2. Structural Durability
Service life: ≥5 years
Maintenance interval: 6-month inspection
Repair requirements: Local repairs possible
Scrap criteria: Structural damage
Technical Summary: Pallet molds ensure the produced pallet products have good load-bearing performance, dimensional stability, and service life through rational structural design, precise manufacturing processes, and strict process control. Mold design must fully consider usage requirements, optimize cooling systems and ejection mechanisms, and improve production efficiency and product quality. The production process requires strict control of process parameters, regular mold maintenance, and upkeep to ensure long-term stable production.
