Injection molding cooled cavity insert
OwnerJobst Ulrich Gellertinventor
Life of this patent
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Abstract
Injection molding apparatus having a cavity insert (10) with integral inner and outer portions (136, 138) having a cooling fluid flow channel (166) extending therebetween. In a preferred embodiment, the cooling fluid flow channel (166) is formed by a groove (164) machined in the outer surface (162) of the inner portion (136). This brings the cooling fluid flow closer to the cavity (66) and improves cooling efficiency and reduces cycle time.
Claims8
In an injection molding apparatus having a cavity (66) with an outer surface (160) extending in a mold (16) and a hollow cavity insert (10) having an inner surface (158) mounted in the mold (16) wherein the inner surface (158) of the cavity insert (10) forms at least a portion of the outer surface (160) of the cavity (66), the improvement wherein;
- the cavity insert (10) has at least a hollow inner portion (136) and a separately formed hollow outer portion (138) integrally joined to the inner portion, the outer portion (138) having an inner surface (144) and the inner portion (136) having an outer surface (162), the inner portion (136) fitting inside the outer portion (138) with the outer surface (162) of the inner portion (136) adjacent the inner surface (144) of the outer portion (138), one of the outer surface (162) of the inner portion (136) and the inner surface (144) of the outer portion (138) having a groove (164) therein to form a cooling fluid flow channel (166) extending between the inner portion (136) and the outer portion (138) from a cooling fluid inlet (168) to a cooling fluid outlet (170) in a predetermined configuration around the cavity (66).
An injection molding apparatus comprising a mold core (70) and a substantially cylindrical mold cavity insert located in a mold cavity plate (74), said mold cavity insert (10) being made of at least an inner portion (136) and a separately formed outer portion (138) metallurgically bonded together to form a mold cavity cooling channel (166) therebetween.
An injection molding apparatus comprising a mold core (70), a mold cavity plate (74), a substantially cylindrical mold cavity insert (10) located in said mold cavity plate (74), said mold cavity insert (10) being made of at least an inner portion (136) and a separately formed outer portion (138) metallurgically bonded together to form a mold cavity cooling channel (166) therebetween and a gate insert (64), whereby the outer portion (138) of the mold cavity insert (10) extends beyond the inner portion (136) of the mold cavity insert (10) and around the gate insert (64).
Dependencies are inferred from the claim text.