Pvc Fitting Mould Pipe Elbow Mould Wholesale - Spark Mould

Sink U Bends has a 180-degree bending angle. The core is separated from the elbow and needs a larger rotation angle. The best way to save space is to rotate the core around the center of the 180-degree elbow. Therefore, the revolving pair must be connected to one end of the mold core. This means that the core must be divided according to the mold structure design. As shown in the figure, the core of this Sink U Bends mold is divided into 3 sections to facilitate the entire rotation action.

We designed a set of linear gear mechanism on the back of the moving platen, which converts the linear motion of the hydraulic cylinder into rotational motion. However, the rotation of the core will definitely drive the product to rotate, so a stop block needs to be designed to peel off the product.

As shown in the video. The ejection action of this Sink U Bends Mold is divided into 3 steps.

Step 1: The hydraulic cylinder located on the upper side of the movable mold first removes part of the core block to leave space for the core to rotate.

Step 2: The hydraulic cylinder drives the gear to rotate, driving the rotating arm to rotate out of the core. At the same time, the stop block prevents the elbow from rotating with the core.

Step 3: The ejector plate pushes out the rotating mechanism and the elbow. The elbow falls due to gravity.

The accuracy of Sink U Bends Mold directly affects the dimensional tolerance and surface finish of the finished parts. The following are the key steps in its manufacturing:

CAD modeling: Based on the 180-degree bending angle of the p trap elbow and the 2-inch pipe diameter parameters, the flow channel design is optimized using 3D software to ensure uniform filling of molten PVC during injection molding.

Parting surface design: The single parting surface structure is used to facilitate demoulding and reduce flash, thereby improving production efficiency.

Mold steel material: Select hot working mold steel such as H13 or P20. After quenching, the hardness reaches HRC48-52, which can withstand high-pressure injection molding and frequent mold opening and closing.

Surface treatment: Chrome plating or nitriding treatment enhances wear resistance and extends the mold life to more than 500,000 times.

Rough machining: Use high-speed milling to remove excess material, leaving a 0.3-0.5mm finishing allowance;

Finishing: Use electrospark machining (EDM) to carve tiny structures, such as threaded interfaces and sealing grooves, to ensure a tolerance of ±0.02mm;

Polishing: The mold cavity is polished to a mirror effect (Ra≤0.2μm) to reduce surface defects of PVC products.

First piece inspection: check the bending radius, pipe diameter and wall thickness of sink u bends by three-dimensional coordinate measuring machine;

Pressure test: simulate the actual use scenario and verify the stability of the mold under high pressure injection molding;

Iterative improvement: adjust the layout of cooling water channel according to the mold trial results and shorten the molding cycle to less than 30 seconds.

Efficient production: The daily production capacity of a single mold can reach 8,000 pieces, meeting the needs of large-scale projects;

Consistency guarantee: The mold temperature control system controls the cavity temperature fluctuation within ±2℃ to ensure that the size of each 2-inch PVC trap is uniform;

Environmental protection and energy saving: Optimized flow channel design reduces raw material waste, and a single injection molding saves 5% of PVC materials.

Certification standards: give priority to mold manufacturers that have passed ISO 9001 certification to ensure that the manufacturing process is controllable;

Case verification: examine whether the supplier has a successful case of complex bending structures such as 180 deg elbow;

After-sales service: provide mold maintenance manuals and quick response teams to reduce long-term use costs.

The precision manufacturing of Sink U Bends Mold is the basis for ensuring the efficient operation of the drainage system. From design to processing, the technological breakthroughs in each link are driving the evolution of P Trap Elbow towards a more durable and environmentally friendly direction. Choosing a professional mold supplier is not only choosing a tool, but also injecting quality genes into the entire pipeline project.