A Double Station PVC Baking Machine (also known as a Dual-Table PVC Curing Oven or 2-Station PVC Drop Molding Machine) is an essential heating unit used in the manufacture of micro-injected 3D PVC products.
It is designed to gel (cure) liquid PVC plastisol inside metal molds (aluminum, brass, or copper) after liquid dispensing. By utilizing two alternating worktables, it allows an operator to perform loading, cooling, and dispensing on one station while the second station is actively baking inside the heating chamber.
In PVC drop molding (micro-injection dispensing), the industrial baking oven plays a critical role in gelling (curing) liquid plastisol PVC resin into flexible, solid 3D items like labels, patches, keychains, and shoe charms.
Compared to single-station box ovens, the primary advantage of the dual-station layout is the elimination of idle waiting time during the heating process.
1. Station A: Baking inside the heating chamber (active heating zone): The mold positioned at Station A automatically slides into the enclosed heating chamber. Far-infrared (IR) heating elements rapidly heat the mold, triggering the gelation reaction of the liquid PVC plastisol (typically at temperatures between 160°C and 220°C).
2. Station B: Unloading and cooling (external station operations): While Station A is baking, the operator performs the following tasks at Station B (located outside the heating chamber): Cooling—molds from the previous cycle are rapidly cooled on a water-cooled platform. Demolding—removal of the finished PVC labels, badges, or keychains. Dispensing—depositing fresh liquid PVC resin into the mold cavities in preparation for the next production cycle.
3. Automatic station switching (Pneumatic/Servo sliding system): Once the timer for Station A expires, the oven opens automatically. Station A slides out to the cooling zone, while Station B slides into the heating chamber to begin baking immediately.
Key technical features and equipment structure:
Components—Technical functions and descriptions; Upper and lower heating elements—Equipped with far-infrared (IR) ceramic or quartz heating tubes. The upper and lower heating zones are independently controlled by PID digital modules to ensure uniform mold heating.
Water-cooling station platform: Copper or stainless steel cooling coils are embedded beneath the external workstation platform, utilizing circulating chilled water to rapidly cool the high-temperature metal molds.
Pneumatic/Servo sliding system: A smooth horizontal sliding mechanism transports molds between the dispensing/cooling zone and the oven interior.
Independent timing and temperature control: Dual independent digital timers allow Stations A and B to operate with different baking parameters, accommodating the production of asymmetrical molds.
Plasticizer exhaust system: An overhead exhaust duct vents plasticizer fumes and vapors generated during the heat-curing process, maintaining a clean workshop environment. Standard Technical Specifications
Work Area/Station Dimensions: Typically 300×400 mm, 400×600 mm, or 600×800 mm per station.
Temperature Range: Ambient to 300°C (Accuracy: ±1°C, controlled by PID digital sensors).
Power Supply: 3-phase 380V/220V, 50/60Hz (Heating power typically ranges from 6 kW to 15 kW, depending on heating plate size).
Cooling Method: Circulating water-cooled platen + forced air blower.
Operating Pressure: Pneumatic air supply 0.4–0.6 MPa (for automatic platen sliding and chamber door opening/closing).
Why Choose Dual-Station Equipment Over Tunnel Ovens?
Balanced Capacity for Small-to-Medium Orders: Ideal for factory layouts where long, continuous-conveyor tunnel ovens would occupy excessive floor space or consume too much energy.
High Labor Efficiency: Enables continuous production by a single operator—tasks such as baking, cooling, demolding, and re-dispensing can be performed seamlessly without waiting for long oven cycle times.
Energy Efficiency: The highly insulated heating chamber effectively retains heat because the door opens only briefly to swap platens, unlike open-ended tunnel ovens that remain exposed for extended periods.
Precision Multi-Color Molding: Crucial for multi-layer PVC micro-injection molded emblems; the rapid alternating cycle allows fine pattern colors to set (surface cure) before the main background color is injected.
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