Figure 2 shows the mold clamping state, the spring is compressed. The push rod of the injection molding machine completes demolding by pushing the ejector rod 26 and the push plate 5 to push the plastic part away from the core. The two core-pulling mechanisms are installed on the side of the fixed mold. The inner and outer double core pulling, push plate and ejector joint are demolded. When parting, the core-pulling mechanism is immediately core-pulled. The mold is designed reasonably, the structure is compact, and the work is reliable. In Fig. The core pulling on both sides is smooth, the plastic parts are easy to demold, and the surface quality is good, which meets the design requirements. Since both the inner and outer sides of the plastic part require core pulling, two core pulling mechanisms must be provided. At this time, the parting surfaces Ⅲ-Ⅲ start parting, that is, the moving and fixed molds are separated. Since the wrapping force of the plastic part on the lower core 25 is greater than the wrapping force on the middle cavity plate 11 and the surrounding cavity plate 16, the plastic part leaves the fixed mold and remains on the moving mold side. Figure 4 shows the surrounding cavity plate. This mold adopts the combination of push plate and ejector: the pusher plate 5 is demolded around the box. After a long period of production, the mold is working. Complete the core pulling action. When the condensate is pulled out from the main liner bushing 10, the limit screw 7 restricts the movement of the fixed mold, and the mold starts to mold from the parting surfaces II-II. The intermediate cavity plate 11 is fixed on the surrounding cavity plate 16 and is tightly fitted during assembly without gaps or looseness. while the oblique guide bar 15 in the outer core-pulling mechanism moves backward, the outer slider 17 slides to the right. If only the ejector is used for demolding, the ejector presses the bottom of the box during demoulding air cooler mold manufacturers, so that the plastic part can be easily pushed through. The fixed mold push plate 9 pulls the condensate out of the branch channel, and then the condensate is automatically shed. The ejector 26 is used for demolding. When the dynamic and fixed mold is parted and demolded, the pusher plate 5 and the ejector 26 simultaneously eject the plastic part, the plastic part is evenly stressed, the movement is stable, and the mold can be demolded smoothly. Enter the next working cycle. 2, the oblique guide pin 15, the outer slider 17, the limit stop 18 and the outer slider connecting plate 19 (the upper guide slide groove) constitute the outer oblique guide column core pulling mechanism, which is suitable for occasions with large space The core pulling area is very large, so the pulling force and locking force are very large.1 Core pulling mechanism design
