Figure 1 Parts of injection molded parts 1. Analysis and structural design of the core pulling mechanism It can be seen from Fig. 1 that the most difficult part of designing the injection mold is how the core forming the four holes is separated from the product, that is, the design of the lateral core pulling mechanism. In order to minimize the number of side core pulling mechanisms to reduce the mold structure, as shown in Figure 2, the No. 1 hole (ie, the core) is set to be consistent with the mold opening direction, then the 2, 3, and 4 holes are set to side draw. Core mechanism. The No. 2 hole is perpendicular to the No. 1 hole and parallel to the parting surface. Therefore, the core pulling mechanism is designed to be the most commonly used oblique guiding column lateral type core pulling mechanism, and the No. 3 hole, No. 4 hole and parting surface It is neither vertical nor parallel, and the core pulling situation is more complicated. The core pulling mechanism can have four options: Figure 2 Analysis of the core pulling mechanism 1. Core 2. Left oblique core 3. Side core 4. Right oblique core Option 1: The inclined guide column core pulling mechanism. Theoretically feasible, but the inclined guide column core is extracted from the oblique side core in the direction of the movable mold, so the parting surface is an oblique split surface. The side core corresponding to the No. 2 hole has adopted the inclined guide column core-pulling mechanism, and the parting surface is a straight split type surface. If the oblique side parting adopts the oblique guide column method, the parting surface is partially straight and partial. It is oblique and will be complicated. At the same time, in order to prevent the slider from slipping during injection molding, the flash must be provided with a locking block, and the locking block will also be complicated, so the solution is difficult to implement in mold manufacturing. Option 2: Gear and rack core pulling mechanism. This mechanism is also feasible in theory, but it is bulky, difficult to manufacture, increases the cost of mold raw materials and manufacturing costs, and is difficult to repair. At the same time, the setting of the locking block is also complicated, so this solution is actually difficult to implement. . Next page Automobile Parts Mould,Door Panel Injection Mould,Door Panel Plastic Injection Mold,Automobile Door Plastic Injection Moulds Taizhou ANO MOULD CO.,LTD , https://www.ainomould.com
Plastic injection molds (injection molds) are one of the most important and important plastic molding dies, and the injection molding of the lateral split core pulling mechanism for forming plastic products with undercuts is complicated. As shown in Figure 1, this plastic product is a part of a puzzle, requiring ABS plastic, pink translucent, 500,000 pieces. 
