As shown above, this is our company’s recent mold project- 90 degree elbow mold . An injection mold for the production of plastic bends. For plastic elbow molds, the core structure is essential. We use the collapsible mold core, since the structural characteristics of the product different from the traditional PVC 90 degree elbow. Let’s look down. Mold and parameters: The picture above shows the overall appearance of the mold. The Mold size CI3540. How about it? It is like a big hammer. Slider and hydraulic cylinders to make it look very prominent . Product Analysis: Although it is not a big guy. Its structural characteristics have caused us some trouble. Now let’s look at the product. There will be two straight sides on the finished product,the slider cannot slide out directly due to the bend in the product,this is why we have to design a special mold structure for releasing the mold. The design analysis of the mold: According to the product requirements,our engineering department designed an innovative mold structure to solve the issue of mold releasing. The mold will need two sliders for this product, as you can see the image to the right, the first slider is only for the straight section, the second slider needs to go straight and then rotate the core inserts out of the part. Collapsible core: For the mold smoothly,we have to separate the Second slider into 3 core inserts. In fact, this variant core structure is more like a chain. Therefore it is also called chain core structure. To make the product release from the mold smoothly ,we designed and manufactured three pivoting core inserts. It depends on the arc length of the elbow and it has two straight area. The only disadvantage of this structure is that the mold core cannot carry cooling. Only used the method of external cooling .