Tinko's sequential valve gates can be used as hydraulic valve gates and pneumatic valve gates, controlling the flow sequence and timing of the gates in pneumatic or hydraulic systems. Sequential valve gates are widely used in molding complex or large parts, helping to improve mold balance and part quality. Tinko, as a temperature controller company, offers a modular series, wall-mounted, touch screen, and portable compact series of sequential valve gates. This technology achieves precise control of melt flow by setting a valve device for each gate that can be independently controlled to open and close, based on traditional hot runner molds.
The sequential valve gate technology uses hydraulic cylinders or pneumatic cylinders to drive the valve device, controlling the opening and closing of the gate. During the injection molding process, by precisely controlling the opening time and sequence of each gate, the melt flows into the cavity in sequence, thereby avoiding weld lines and improving the quality of the product.
Eliminates weld lines
By controlling the flow direction and flow rate of the melt, the melt merges sequentially in the cavity, effectively eliminating weld lines and improving the appearance quality and mechanical properties of the product.
Reduces molding pressure
Because the melt flow is more even, the molding pressure is reduced, which minimizes mold wear and deformation.
Shortens molding cycle
By optimizing the melt flow path, filling efficiency is improved, thereby shortening the molding cycle.
Improves product quality
By precisely controlling the flow of the melt, the wall thickness of the product becomes more uniform, reducing defects such as shrinkage and warping.
When using sequential valve gate technology to mold products like hydraulic valve gate controller and pneumatic valve gate controller, the process generally involves the following four steps:
Injection start
Open the central gate of the mold to inject the melt into the cavity, allowing it to split towards both sides.
Close central gate
When the melt just flows through the side gates, close the central gate and simultaneously open the side gates so the melt continues to flow towards both ends of the cavity.
Compensation and pressure holding
After the melt fills the entire cavity, start the compensation and pressure holding process, opening all gates to ensure the density of the product.
Cooling and part removal
After pressure holding ends, close all gates, cool the product, and open the mold to remove the part.
