Injection molding heater with melt bore therethrough
OwnerJobst Ulrich Gellertinventor
Life of this patent
Estimating the term…
Abstract
An injection molding heater (38) having one or more melt bores (78) extending therethrough to be removably mounted between the melt distribution manifold (26) and each nozzle (10) in a multi-gate injection molding system. The heater (38) has a plate-like body (92) made of a thermally conductive material and heat is provided to it by a heating element (98) which can be electrical or a heat pipe or by a heated fluid flowing through a passage (126) in the plate-like body (92). Each one or more of the heaters (38) can be connected to separately controlled power sources to separately adjust the heat provided by the heaters (38).
Claims38
A heater for a melt distribution manifold of an injection molding machine having at least one injection nozzle, the heater (38) having a plate-like body (92) adapted to be interposed between and contact the manifold and the at least one nozzle, and means to heat the plate-like body (92), the plate-like body (92) having a rear face (130) adapted to contact the melt distribution manifold, a front face (132) adapted to contact the at least one nozzle, and at least one melt bore (78) extending therethrough, each of said melt bores (78) defining a substantially straight path through the plate-like body (92) from the rear face (130) to the front face (132) thereof.
In a hot runner injection molding apparatus having at least one nozzle (10) seated in a mold (14), a melt distribution manifold (26), and a melt passage (72) extending from an inlet (74) through the melt distribution manifold (26) and the at least one nozzle (10) towards at least one mold cavity (86), the improvement comprising:
- a heater (38) mounted upstream of the at least one nozzle (10), the heater (38) having a plate-like body (92) and means to heat the plate-like body (92), the plate-like body (92) being made of a thermally conductive material and having a rear face (130), a front face (132), and at least one melt bore (78) extending therethrough, each of said melt bores (78) defining a substantially straight path through the plate-like body (92) from the rear face (130) to the front face (132) thereof, the rear face (130) abutting against the melt distribution manifold (26), the front face (132) abutting against the at least one nozzle (10), and the at least one melt bore (78) forming a portion of the melt passage (72).
In a hot runner injection molding apparatus having a mold defining at least one cavity, a melt distribution manifold (26) and a plurality of nozzles (10) seated in the mold (14) with a melt passage (72) branching in the melt distribution manifold (26) from a common inlet (74) and extending through each of the nozzles (10) towards at least one cavity (86), the improvement comprising:
- a plurality of heaters (38) each mounted between the melt distribution manifold (26) and at least one of the nozzles (10), each heater (38) having a plate-like body (92) and means to heat the plate-like body (92), the plate-like body (92) being made of a thermally conductive material and having a rear face (130), a front face (132), and at least one melt bore (70) extending therethrough, each of said melt bores (78) defining a substantially straight path through the plate-like body (92) from the rear face (130) to the front face (132) thereof, the rear face (130) abutting against the melt distribution manifold (26), the front face (132) abutting against the at least one nozzle (10), the at least one melt bore (78) forming a portion of the melt passage (72).
Dependencies are inferred from the claim text.