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The side core-pulling mechanism is used to solve the complicated mechanism of plastic parts. There are many types of side core-pulling mechanisms, and there are various classification methods. This article refers to four types of side core-pulling mechanisms.

Threaded plastic parts are common. There are two types of threads on the plastic parts: external and internal. The external threads with low accuracy are often eject by a side core pulling mechanism. Internal thread has two structures: forced ejection and automatic unscrew.

Whether the mold is set with an air venting has a great influence on the quality of plastic parts. For thin-wall plastic parts, small plastic parts or precision parts, the air venting is a crucial point. And in the same plastic part, the part away from the gate position needs to be designed with air venting.

In the design of injection molds, a slider mechanism is often applied to the slider. This mechanism is called the slider core-pulling delay mechanism. The slider core-pulling mechanism is often used in the following two aspects:

Large injection molds mean high manufacturing costs. Compared with general injection molds, it has larger size and weight. Difficulties in the manufacturing, transportation, and installation of molds. So when designing, we have to combine many factors.

Double ejection is a common method of ejection system. This method is used to form plastic parts with undercut. When the lifter cannot be used and the slider pops up. In order to better ejection the product, or to avoid gate strain. Sometimes in order to meet the automatic ejection of the plastic part, it is necessary to add another ejection action.

If you want to manufacture high quality injection tools, you need to read this article. In this article, I discuss the factors that affect the quality of injection tools. These factors need our attention. Let us dive in.

The hydraulic cylinder can realize the lateral parting or core pulling of the injection mold. Its movement is smooth, flexible and simple. Not limited by mold opening time and ejection time.
How to design a reliable hydraulic cylinder mechanism? In addition to the theoretical knowledge of the cylinder, these 8 points should also be considered in the design.

The cavity of the half mold is composed of two or more sliders. At the time of mold opening, the slider simultaneously achieves side parting. The stroke of the side core pulling of the half mold is generally small. Half mold can be divided into: fixed mode Half blocks and moving mode Half blocks. Both structures have their own advantages and disadvantages, and can be used for different products. The fixed mold half slider structure is relatively uncomplicated. In the design, pay attention to factors such as stroke, guide block, drive block and so on. The above notes can help you design better.

Among auto molds, auto injection molds are the most common molds. In auto injection molds, there are two main distinctions. One is the exterior and interior parts of the car, and the other is the structural parts. On the complexity of auto mold structure. The car exterior structure is headed by a bumper. Car interiors are led by instruments. Automotive structural parts should be led by automotive air conditioners and intake manifolds.

There are two types of threads on plastic parts: external threads and internal threads. External threads with low accuracy generally use lateral core-pulling mechanism. The internal thread has two structures: forced ejection and automatic ejection. Most automatic unscrew thread injection molds are multi-cavity molds. Excluding larger-sized threaded plastic parts. Multi-cavity threaded injection mold means more mechanisms. This threaded lid mold is relatively simple. The complex thread mechanism can be expanded by referring to this article.

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.