the slide should be in the chute after moving completion
Upon completion of core-pulling, the slide left in the chute should not be less than 2/3 of total length of slide.
Prevent mutual interference in the core-pulling mechanism of a mold
Try not to make the projection of the ejector pin coincide with that of the active core on the parting line to prevent mutual interference of the slide and the ejector unit during restoration.
Plastic part remains on the moving mold
When the slide is set on the fixed mold, […]
core-pulling distance in the core-pulling mechanism of a mold
Pull the active core out from the molding position to a place not interfering ejection of the plastic parts, and the distance moved by the active core or slide is called core-pulling distance. Generally, core-pulling distance equals to the depth of side hole plus a safety distance of 2—3mm. A core-pulling mechanism for pulling a slide [...]
dip angle of angle pin in the core-pulling mechanism of a mold
The size of dip angle is not only related with the bending force of angle pin and the actually realized pulling force but also connected with the working length of angle pin, […]
Side core-pulling mechanism drived by spring in mold
When the side concave of plastic parts is shallow and requires relatively smaller pulling force, spring or ebonite can be used to achieve core-pulling.
Power-driven core-pulling in mold
Such mechanism pulls out the active cores by utilizing the mold opening force of injection machine and through the driving of parts. […]
Hydraulic or Pneumatic Core-pulling in mold
Use pressure oil compressed air as power, equipped the molds with special hydraulic or pneumatic tank, […]
Manual pulling in mold
Manual pulling refers to the pulling of side-direction cores with hand or hand tools. Such mechanism is simple in structure yet low in productivity and large in labor intensity.
what is core-pulling mechanism
the flanks of plastic parts are usually provided with holes or flutes, under such cases, side-direction forming cores must be employed to form plastic parts. […]