Meet our new slide injection mold
We are glad to introduce you our new slide injection mold. It is design to produce plastic accessories for PVC and aluminum windows. This mold is multipurpose – it combines the simultaneous production of two different parts. That means that in one stroke of the molding machine we become two types of parts.
The reason that we used this type of injection mold – with slides and cam pins is that the desired parts have undercuts that could not be form with common injection mold.
Тhe slides and cam pins ensure additional lateral movement that secure the safe part ejection out of the mold.
With this type of injection mold, we can guarantee reliable and fast manufacturing during our production process.
The reason that we used this type of injection mold – with slides and cam pins is that the desired parts have undercuts that could not be form with common injection mold.
Тhe slides and cam pins ensure additional lateral movement that secure the safe part ejection out of the mold.
With this type of injection mold, we can guarantee reliable and fast manufacturing during our production process.
In general, the slide injection molds have more than one parting surface – usually one in direction of opening the injection-molding machine and one or more parting surfaces in lateral direction.
Except for common guide pillars and guide bushes, they have in addition cam pins, which open the sliders of the mold, in direction squire of the opening of the injection mold machine. The cam pins set the sliders in motion and they start to slip on the guides. Most common guides are with rectangular cross section or are type dove – tail. In this particular case, we use guides with rectangular cross section.
Because the closure forces of the sliders are considerable, in the mold are incorporated cotters (the cotters undertakes the closure forces).
To limit the movement of the sliders and to protect it from falling from the mold, there are slide retainers, which are incorporated in the mold. In this case, we use spring stopper.
The drive of the sliders could be mechanical, hydraulic or pneumatic.
We use the most common drive – mechanical. We use mechanical drive, which deploy the opening of the mold.
The sliders are moving steady during the opening of the mold. The size of the slider stroke depends on the cam pin depth in the slider and must be greater than slider height.
When the slider needs to be activated immediately after the mold opening, the diameter clearance between it and support plate must be 0.2mm.
When the slider needs to be open later than the mold, the hole is made with clearance oval shape.
In this particular case, we used holes with clearance and oval shape in the support plate, because we want the slider to be open later than the mold.
For the less loading on the cam pins, the angle of inclination must be minimal. At the same time, this angle must be bigger than 12° (friction limit angle). Depends on the desired cam pin stroke the angle of inclination must have the value between 15° and 25°.
In our case, we chose the cam pin angle of inclination to be 18°.
The cotter inclination, which push the sliders, must be bigger angle than the cam pin angle (with more than from 2° to 5°). In this way, it will be possible to avoid the friction between the cotter and the slider and will be ensured the complete closure of the sliders.
In our case, we used cotter with angle inclination 20°.
Except for common guide pillars and guide bushes, they have in addition cam pins, which open the sliders of the mold, in direction squire of the opening of the injection mold machine. The cam pins set the sliders in motion and they start to slip on the guides. Most common guides are with rectangular cross section or are type dove – tail. In this particular case, we use guides with rectangular cross section.
Because the closure forces of the sliders are considerable, in the mold are incorporated cotters (the cotters undertakes the closure forces).
To limit the movement of the sliders and to protect it from falling from the mold, there are slide retainers, which are incorporated in the mold. In this case, we use spring stopper.
The drive of the sliders could be mechanical, hydraulic or pneumatic.
We use the most common drive – mechanical. We use mechanical drive, which deploy the opening of the mold.
The sliders are moving steady during the opening of the mold. The size of the slider stroke depends on the cam pin depth in the slider and must be greater than slider height.
When the slider needs to be activated immediately after the mold opening, the diameter clearance between it and support plate must be 0.2mm.
When the slider needs to be open later than the mold, the hole is made with clearance oval shape.
In this particular case, we used holes with clearance and oval shape in the support plate, because we want the slider to be open later than the mold.
For the less loading on the cam pins, the angle of inclination must be minimal. At the same time, this angle must be bigger than 12° (friction limit angle). Depends on the desired cam pin stroke the angle of inclination must have the value between 15° and 25°.
In our case, we chose the cam pin angle of inclination to be 18°.
The cotter inclination, which push the sliders, must be bigger angle than the cam pin angle (with more than from 2° to 5°). In this way, it will be possible to avoid the friction between the cotter and the slider and will be ensured the complete closure of the sliders.
In our case, we used cotter with angle inclination 20°.
With the design and production of this injection mold, our company continues to provide complete solution for injection molding processes - from the design and manufacturing of the injection molding equipment to the production of the plastic parts.