Thermoforming is a manufacturing process used to shape plastic sheets into various custom design products. It involves heating a plastic sheet until it becomes pliable, then using a mold or a vacuum to form it into the desired custom shape.
Thermoforming and vacuum forming are both processes used to shape plastic sheets into specific forms. However, there are some differences between the two techniques:
Thermoforming is a versatile process that is widely used in industries such as packaging, automotive, aerospace, and medical. It offers advantages such as cost-effectiveness, quick turnaround times, and the ability to produce complex shapes with high precision.
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1. Process: In thermoforming, a plastic sheet is heated until it becomes pliable, and then it is pressed against a mold using pressure or a vacuum. Vacuum forming, on the other hand, relies solely on the use of a vacuum to draw the heated plastic sheet onto the mold.
2. Mold complexity: Thermoforming is typically used for more complex shapes and intricate molds, as it allows for greater detail and precision. Vacuum forming, on the other hand, is better suited for simpler shapes and molds that do not require as much detail.
3. Material thickness: Thermoforming is often used for thicker plastic sheets, typically ranging from 0.030 to 0.250 inches in thickness. Vacuum forming is more commonly used for thinner plastic sheets, typically ranging from 0.005 to 0.060 inches in thickness.
4. Production volume: Thermoforming is generally more suitable for high-volume production due to its faster cycle times and ability to handle larger sheets of plastic. Vacuum forming is better suited for low to medium volume production, as it has slower cycle times and is limited by the size of the vacuum forming machine.
5. Cost: Thermoforming typically requires more expensive equipment and molds, making it a more costly process compared to vacuum forming. Vacuum forming, on the other hand, is a more cost-effective option for smaller production runs or prototypes.
Overall, thermoforming is a more advanced and versatile process that offers greater precision and complexity, while vacuum forming is a simpler and more cost-effective option for less complex shapes and smaller production volumes.
Injection Moulding System for Pet Preform China
**Product Specifications for Injection Molding Machine Model SZ-950A**
- **Model No.:** SZ-950A
- **Computerized:** Yes
- **Certification:** CE, ISO 9001:2008
- **Clamping Force:** 950 kN (95 tons)
- **Injection Pressure (PS):** 183 MPa
- **Space Between Tie Bars:** 360 × 360 mm
- **Screw Diameter:** 40 mm
- **Max Shot Weight:** 183 g (for PS)
- **Machine Size:** 4.25 × 1.2 × 1.8 m
- **PLC Brand:** Siemens
- **Market:** Injection Molding Machine Market
- **After Sales Service:** Engineers available for overseas service
- **Warranty:** 12 months
- **Trademark:** King Machine
- **Specification:** SGS, ISO, and CE approved
- **Origin:** Zhangjiagang City, China
- **HS Code:** 84771010
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### Injection Molding System for PET Preform
This injection molding system is designed for high-performance production of PET preforms. It combines advanced technology with user-friendly features to ensure precision, efficiency, and reliability.
#### Key Features:
1. **LCD Computer Control:** Equipped with a large display screen for easy monitoring and operation.
2. **Hydraulic Double Proportional Valve:** Ensures smooth and accurate control of the hydraulic system.
3. **Hard Chrome Plated Steel Tie Bars:** Increases durability and resistance to wear.
4. **Spacious Mold Area:** Provides ample room for large molds, enhancing versatility.
5. **Large Opening Stroke:** Allows for easier mold loading and unloading.
6. **Two Position Transducers:** For precise control of clamping and injection processes.
7. **Four-Stage Injection:** Offers independent velocity and pressure control for better material flow.
8. **Hydraulic Mould Height Adjustment:** Makes it easy to adapt to different mold sizes.
9. **Screw Cold-Start Prevention Device:** Reduces wear and improves machine longevity.
10. **Melt Decompression Control:** Helps in maintaining consistent melt quality.
11. **Screw Back Pressure Control:** Enhances mixing and melting performance.
12. **Multiple Hydraulic Ejection:** Improves ejection efficiency and reduces cycle time.
13. **Differential High-Speed Clamping:** Increases productivity with faster closing speeds.
14. **Centralized Lubrication System:** Simplifies maintenance and extends equipment life.
15. **Low Pressure Mould Protection Device:** Prevents damage during the molding process.
16. **Mechanical Safety Interlock:** Adds an extra layer of safety for operators.
17. **Double Electrical Safety Interlock:** Ensures secure operation and prevents accidental start-up.
18. **Oil Return Filter:** Keeps the hydraulic system clean and efficient.
19. **Oil Tank with Inner Stainless Steel Container:** Ensures hygiene and prevents contamination.
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### Technical Specifications Table
| Item | Unit | Data |
|------|------|------|
| Max Clamping Force | kN | 950 |
| Max Opening Force | mm | 340 |
| Space Between Tie Bars | mm | 360 × 360 |
| Mould Height (min–max) | mm | 135 – 380 |
| Max Daylight | mm | 720 |
| Ejector Force | kN | 25.4 |
| Ejector Stroke | mm | 85 |
| Ejector Quantity | – | 5 |
| Screw Diameter | mm | 30 / 35 / 40 |
| Screw L/D Ratio | – | 24.5 / 21 / 18.4 |
| Theoretical Shot Volume | cm³ | 113 / 154 / 201 |
| Plasticizing Weight (PS) | g | 103 / 140 / 183 |
| Injection Pressure | MPa | 249 / 183 / 140 |
| Theoretical Injection Rate (PS) | g | 67.5 / 91.8 / 120 |
| Plasticizing Capacity (PS) | g/s | 8.3 / 12.5 / 18 |
| Screw Torque | N·m | 510 |
| Max Screw Rotational Speed | rpm | 260 |
| Injection Stroke | mm | 160 |
| Pump Motor Power | kW | 11 |
| Pump Pressure | MPa | 16 |
| Heating Power | kW | 7.3 |
| Heating Zones | – | 4 |
| Machine Dimensions (L×W×H) | m | 4.25 × 1.2 × 1.8 |
| Net Weight | t | 3.2 |
| International Designation | – | 950-280 |
This machine is ideal for manufacturers looking for a reliable and high-capacity solution for producing PET preforms. With its advanced features and robust construction, the SZ-950A ensures consistent quality and long-term performance.