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4 Cavities Union Nut mold - Helix Bar Unscreing Thread Mechanism
4 Cavities Union Nut Mold Structure
The core of this Union Nut Mold is its special automatic unscrewing thread mechanism. This mechanism consists of a Helix Bar, a rifling guide sleeve, and a gear set. The screw rod is fixed at the center of plate A. The thread core is unscrewed and reset by the forward and backward movement of the moving plate.
The thread core of this mechanism only rotates and does not retreat. The spring mechanism continuously pushes up the B plate, allowing the Nut to be ejected as the thread is released. The advantage of this method is that it can reduce mold parts and space. Of course, a prerequisite is that your product can be designed with a stop. The product cannot rotate with the thread core.
4 Cavities Union Nut Mold Structure Dynamic Simulation
The mechanism of Union Nut Mold is shown in the video. When the mold is opened, the rifling guide sleeve starts to rotate along the spiral rod, and the gears drive the thread core to rotate. The product does not rotate, and the B plate is continuously lifted by the spring. The thread core is gradually separated from the product.
Core Technology: Helix Bar Unscrewing Thread Mechanism
The Helix Bar Unscrewing Thread Mechanism represents a leap in automated demolding technology. By integrating a multi-start helical rod (Rifle) into the mold design, this system achieves seamless thread ejection through rotational motion. Key advantages include:
1. Helix Bar Precision Dethreading System
Built-in Helix Bar rotary ejection mechanism, through linear → rotary motion conversion, drives the core to rotate 720° for precise threading.
The helix angle is optimized to 28°±0.5° (matching PVC shrinkage rate), ensuring that the thread is scratch-free (Ra≤1.6μm).
Hardened SKD61 rod body (HRC 52-54) + self-lubricating bearing, life expectancy exceeds 1,000,000 molds.
2. Four-cavity collaborative and efficient layout
Balanced hot runner system (4-point needle valve control) shortens the filling time of Union Nut to 3.2 seconds.
Cavity distance 180×180mm golden ratio, taking into account cooling efficiency and template strength (deformation <0.02mm). Single mold cycle ≤25 seconds, daily output 13,000+ pieces of PVC Union Nut.
3. PVC-specific engineering solutions
Core chrome plating + nano coating (friction coefficient ↓40%), solve the problem of PVC sticking;
Closed-loop water temperature control (±1℃), inhibit thread deformation caused by material thermal expansion;
Compatible with Ø20-50mm PVC Union Nut series production (quick-change insert design);
If you have specific requirements for similar product molds, please contact us now! Let our expertise in injection mold manufacturing become your competitive advantage.