A sleeve heater for supplying heat to a melt delivery component of a hot runner system. The sleeve heater includes a tube-shaped body having an outer surface and an inner surface. The inner surface of the tube-shaped body defines an opening in which a melt delivery component is received. A heater wraps at least partially around the tube-shaped body and extends along a length of the tube-shaped body. A thermocouple groove is formed in the outer surface of the tube-shaped body. The thermocouple groove includes a lateral bend; and a bore that extends from the lateral bend into a thickness of the tube-shaped body. Together the bore and the latera bend maintain the position of a sensing end of a thermocouple installed therein relative to the tube-shaped body.

An electric heater (100) with an axial opening (131) for receiving an object to be heated, with an electric heating element (130) surrounding the axial opening (131) in at least in some sections and with an essentially cylindrical or essentially frustoconical clamping jacket (110) surrounding the electric heating element (13) at least in the radial direction for generating an adjustable force acting radially in the direction of an axis (A) of the axial opening (131). The clamping jacket (110) is a multipart clamping jacket and has at least one pressing segment (113, 114) for introducing the force acting radially in the direction of an axis (A) of the axial opening (131) as well as at least one clamping segment (111, 112), with which the width of the gap (119a, 119b) between adjacent edges of oppressing segments (113, 114) can be varied for adjusting the force acting radially in the direction of an axis (A) of the axial opening (131) by moving the clamping segment (111, 112) relative to the pressing segment (113, 114).

A heating apparatus (5) in an injection molding apparatus (1000) comprising: a heatable sleeve or jacket (10) comprised of a sheet (14) of highly heat conductive metal material, formable into a heating cylinder (14c) having a central channel (16) receiving a selected nozzle (40), a stabilization ring or cylinder (20) adapted to receive a selected longitudinal portion (DL) of the downstream or distal end (14de) of the heating cylinder (14c) and to engage or mate an inner circumferential surface (20is) with an outer surface (14os) of the heating cylinder.

A heater system includes a substrate, a layered heater having a resistive layer formed on the substrate by a layered process, the resistive layer having sufficient temperature coefficient of resistance characteristics such that the resistive layer is a heater element and a temperature sensor. A single set of electrical leads having two electrical lead wires provides power to the resistive layer and receives a signal indicative of a temperature of the resistive layer. A two-wire controller includes a power controller, and the two-wire controller is configured to receive the signal indicative of the temperature of the resistive layer, determine the temperature of the resistive layer, and control temperature of the heater system.

An electric heater (100) with an axial opening (131) for receiving an object to be heated, with an electric heating element (130) surrounding the axial opening (131) in at least in some sections and with an essentially cylindrical or essentially frustoconical clamping jacket (110) surrounding the electric heating element (13) at least in the radial direction for generating an adjustable force acting radially in the direction of an axis (A) of the axial opening (131). The clamping jacket (110) is a multipart clamping jacket and has at least one pressing segment (113, 114) for introducing the force acting radially in the direction of an axis (A) of the axial opening (131) as well as at least one clamping segment (111, 112), with which the width of the gap (119a, 119b) between adjacent edges of oppressing segments (113, 114) can be varied for adjusting the force acting radially in the direction of an axis (A) of the axial opening (131) by moving the clamping segment (111, 112) relative to the pressing segment (113, 114).

An electric heater (100) with an axial opening (131) for receiving an object to be heated, with an electric heating element (130) surrounding the axial opening (131) in at least in some sections and with an essentially cylindrical or essentially frustoconical clamping jacket (110) surrounding the electric heating element (13) at least in the radial direction for generating an adjustable force acting radially in the direction of an axis (A) of the axial opening (131). The clamping jacket (110) is a multipart clamping jacket and has at least one pressing segment (113, 114) for introducing the force acting radially in the direction of an axis (A) of the axial opening (131) as well as at least one clamping segment (111, 112), with which the width of the gap (119a, 119b) between adjacent edges of oppressing segments (113, 114) can be varied for adjusting the force acting radially in the direction of an axis (A) of the axial opening (131) by moving the clamping segment (111, 112) relative to the pressing segment (113, 114).

An injection molding apparatus and an method for the manufacture of moldable articles having an injection manifold, a plurality of hot runner nozzles, a first nozzle heater, a plurality of mold cavities positioned to receive molten material from the plurality of the hot runner nozzles, each mold cavity having at least one mold gate orifice and a mold cavity heater surrounding each mold cavity at least partially and a thermocouple associated with the mold cavity to measure directly or indirectly a temperature generated by the mold cavity heater.