15 kinds of classic core pulling mechanism of injection mould.

Here are 15 types of side core pulling mechanisms for injection mold. It includes four types of mechanisms: ejection type, slider type, rack and pinion, and hydraulic.

1.Ejector pin translation type inner core pulling.
During the ejection process, after the push rod moves a certain distance, the inclined surface at the front of the push rod has taken off the end face of the core, and continues to eject. The inclined surface at the rear of the push rod is in contact with the movable template. And force the ejector pin to move in the direction of the core. Thus, while ejecting the plastic part, the inner core pulling is completed. When the mold is closed, it is reset by the inclined surface at the front of the ejector pin.

2.The inner core of the inclined push rod is hinged with the push plate.
The two ends of the connecting rod are respectively connected to the push plate and the inclined push plate. The ejection force during the ejection process is transmitted through the connecting rod, so that the inclined push plate is moved in the direction of the inclined hole of the movable template. Finish core pulling and ejection of plastic parts.

3.Inside the cylindrical cam.
The cam is guided by the inclined hole on the movable template. During the ejection process, the push plate pushes the inclined push rod, so that the insert can complete the internal core pulling while ejecting the plastic part.

4.Parting mechanism of slider guide.
This is a slider guide that can separate the slider laterally and reclose it. The cylindrical pin or roller on the slider moves in the groove of the guide plate.

5.Pull plate core pulling mechanism.
When the mold is opened, the slider achieves side core pulling under the action of the pulling plate.

6.Gear rack oblique core pulling mechanism.
When ejecting, the transmission rack pulls the rack core through the gear. When the mold continues to be opened, the top plate contacts the top plate and acts simultaneously, and the ejection rod ejects the plastic part.

7.The rack and pinion draws a curved core.
Use the mold opening force to make the rack fixed on the fixed mold drag the gear. After turning through the helical gear, the spur gear drives the arc-shaped core rack to withdraw along the arc. At the same time, the angle pin fixed on the fixed mold pulls out the slider. The plastic part is pushed out by the ejector.

8.The core pulling mechanism that drags the rack and pinion by the mold opening force.
When the mold is opened, the rack rotates the gear. Then the core rack is driven to extract the oblique core and positioned by the spring pin. When the mold is closed, the gear rotates in the reverse direction and the core is reset.

9.Link-type gear transmission pumping arc core.
When opening the mold, the long connecting rod drags the short connecting rod to rotate and rotates the coaxial pinion, and then drives the half-side gear integrated with the curved core to rotate to extract the curved core.

10.Hydraulic core pulling mechanism.
During the mold opening process, after the moving mold leaves the wedge block, the hydraulic system works and the core is pulled out of the plastic part. Continue to open the mold, the plastic part is ejected and dropped. During the mold clamping process, the hydraulic system should reset the core first to avoid interference with the wedge block.

11.Inside hydraulic core pulling mechanism.
The inner core is connected with the piston rod of the hydraulic cylinder by screws. After the mold is opened, when the pusher plate is ejected, the core has not hindered the inner core pulling. The inner core is pulled by a hydraulic cylinder.

12.The hydraulic cylinder is provided with a core-pulling mechanism in the core.
The hydraulic core-pulling mechanism of this pair of molds greatly reduces the overall dimensions of the molds because the hydraulic cylinder is installed in the hole hollowed out by the large core.

13.Arc core of hydraulic core-pulling mechanism.
When ejecting, the piston rod of the hydraulic cylinder moves to drive the connecting rod. It is connected with crankshaft and core through shaft. The core is slid in the arc-shaped groove formed by the pressing plate. The other end of the crank is mounted on the central shaft. The hydraulic cylinder drives the curved core to achieve core pulling and reset. The straight core at the other end of the elbow is driven by the oblique pin to complete the core pulling and resetting action.

14.Multi-core hydraulic side core pull mechanism.
The side cores are connected together by a fixed plate, a slider, a screw, and a piston rod of a hydraulic cylinder. When opening the mold, draw it first, and then reset the side core after closing the mold.

15.Hydraulic oblique core mechanism.

Видео 15 kinds of classic core pulling mechanism of injection mould. канала Spark Mould