PVC molding machines (often called liquid PVC thermoforming machines or double-sided thermoforming machines) are designed for producing solid 3D figurines, keychains, and hollow/semi-hollow toy parts. Unlike flat labels that require open-mold application, 3D figurines require two halves to be clamped together for molding, a process known as PVC drip molding. PVC Machine All
| Model |
JY-E08 |
| Voltage |
380V,3phase |
| Station |
2 |
| WorK area |
300*300mm |
| Cooling type |
Water cooling |
| Total power |
6KW |
| Size |
1000*660*1500*mm |
| Weight |
210KG |
| Cylinder type |
multi-stage-air cylinder |
Heated-cooling presses for PVC plastisol 3D keychains are crucial for gelling and solidifying liquid PVC plastisol into flexible, finely detailed figurine keychains, zipper pulls, and mini cartoon doll ornaments. Liquid PVC plastisol transforms from a slurry into a fully cross-linked polymer at 160°C to 180°C, but must be clamped and heated for molding, then rapidly cooled to below 50°C for easy demolding, preventing deformation or surface defects in the soft 3D parts.
Double-platen hydraulic heated-cooling press (for 3D molded keychains)
Working principle: One press is equipped with independent heating plates (resistance rods) and cooling plates (cold water channels).
Process Flow: The mold enters the heating zone under hydraulic clamping pressure, solidifying the PVC body. Then, the contact between the pressure plate and the water-cooled pressure plate is automatically switched, allowing the material to solidify before mold opening.
Clamping Pressure: Typically 15 to 30 tons to ensure a tight seal between the two-piece molds under thermal expansion.
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PVC 3D Product Production Line:
It works in conjunction with an automated multi-color dispensing machine.
Typical Production Process Flow:
1. Color Dispensing and Detail Preheating: Multi-color liquid PVC is injected through automatic dispensing nozzles into open detail cavities (eyes, clothing, logos, etc.), and partially gels under rapid infrared heating.
2. Baking and Molding: A small portion of the PVC plastisol can be baked in a high-temperature oven to prevent color bleeding.
3. Mold Closure and Vacuum Sealing: During the clamping stage, the upper and lower molds automatically close. During the curing, heating, and cooling stage, the heating plate heats the mold to 160°C to 180°C, causing the PVC plastisol to fully gel, followed immediately by water cooling for setting.
4. Automatic mold opening and demolding, ejection stage: The hydraulic or pneumatic clamps are released, the mold opens, and the 3D doll is demolded.
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