The invention relates to a demoulding mechanism of a side core-pulling extrusion die, which changes the ejection mechanism of a product on the basis of the original device; In the prior art, the extension plate and the striking rod of the push plate are removed, and a hydraulic cylinder is arranged on the fixed plate above the die, which passes through the workbench plate of the press and is placed at the top of the die, and the piston rod of the hydraulic cylinder is connected with the push plate of the die, so that the push plate is not linked with the workbench plate of the press, but is independently controlled by the hydraulic cylinder. The invention is used for demoulding the extrusion die, which solves the problem of difficult demoulding of the product in the die-casting mode with the gate in the center of the product and feeding from below, and provides the possibility for realizing continuous production and program control. Compared with the prior art, the ejector pin plate is not deformed, the installation of the side core-pulling die is stable and unimpeded, the structure is simple, and the control is convenient. It can also be applied to demoulding of extrusion die without side core pulling.

The design of lateral core-pulling mechanism for plastic mold (YC) is only for making good molds.

Through the introduction of plastic mold structure, parting surface design, gating system design and other knowledge, you may have a certain understanding of plastic mold design. This time, we will focus on the knowledge of the core-pulling mechanism on the side of the mold, that is, the slider and the inclined top.

Generally, plastic molds only have a front mold and a back mold, which are relatively simple molds. When there are convex and concave features on the side of plastic products, only the front and rear dies can't be opened normally and can't be ejected by the usual ejection method. The protrusions, depressions, characters and various symbols on the side of the product are called inverted buttons. Such a product structure must have side core-pulling mechanisms such as sliders and inclined tops, except for plastic with soft elastic materials. The commonly used side core-pulling mechanism is divided into two forms: internal core-pulling and external core-pulling, that is, our common inclined top, slider, oil cylinder, rotating motor and so on.

( 1)? Inclined ejector is mainly used for small inverted position of products. When ejecting, the inclined ejector moves along a certain angle at the same time to get rid of the inverted position of the product and realize demoulding.

(2)? Sliding block, when the structure of plastic products is not suitable for oblique ejection, it is necessary to use sliding block. When the mold is opened, the inclined guide pillar is separated from the front mold and the back mold, the slider is pulled out under the driving of the inclined guide pillar, and the product is slowly separated from the back buckle. By changing the inclined guide pillar of the slider, the side core-pulling structure is changed into slider side slider, spring side slider, front die side slider and so on.

(3)? Cylinder side core pulling, when the inverted length of plastic products is long, the inclined guide pillar core pulling can not be used, when it is not suitable for slider side core pulling.

(4)? Hydraulic motor, when the product has internal thread inversion, when demoulding, with the rotation of the motor, the inversion at the thread is continuously withdrawn, thus realizing the disengagement of the inversion at the product.

The above are some common ways of side core-pulling structure of plastic mold.