Apparatus for injection moulding

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, wherein the feed means, within the injection body which contains an injection screw, uses the injection screw upwardly arranged for feeding the moulding composition upwards to the injection head.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, wherein the feed means, within the injection body, which contains an injection screw, extends upwardly from a base disposed below the level of the carrier through an opening in said carrier to a position above the level of the carrier and uses the injection screw upwardly arranged for feeding the moulding composition upwards to the injection head.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, wherein the clamping means comprises a pair of opposed jaws between which a mould set at the injection station is received, a support for the jaws, connecting means for connecting the jaws with the support for limited movement of both jaws relative to the support and actuating means for driving the jaws towards each other, and wherein the jaws are arranged to engage the mould set and there are coolant passages which extend through the jaws to facilitate heat exchange between the jaws and the mould set.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, wherein the clamping means comprises a pair of opposed jaws between which a mould set at the injection station is received, a support for the jaws, connecting means for connecting the jaws with the support for limited movement of both jaws relative to the support and actuating means for driving the jaws towards each other, and wherein the jaws are arranged on the two opposite sides of the carrier on which the mould set rests, to engage the mould set and there are coolant passages which extend through the jaws to facilitate heat exchange between the jaws and the mould set.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, said injection head being adjustable relative to said carrier in a direction transverse to the direction of movement of said carrier by said driving means, said apparatus further comprising a positioning means for adjusting the position of the injection head when the injection head is in an injection position and in a withdrawn position.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, said injection head being adjustable relative to said carrier in a direction transverse to the direction of movement of said carrier by said driving means, said apparatus further comprising positioning means for adjusting the position of the injection head when the injection head is in an injection position and in a withdrawn position and for moving the injection head between said injection position and said withdrawn position.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, said injection head being adjustable relative to said carrier in a direction transverse to the direction of movement of said carrier by said driving means, said apparatus further comprising a positioning means for moving the injection head between an injection position and a withdrawn position, wherein said positioning means is arranged for moving the injection head relative to the injection body and wherein said injection body contains an injection screw.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, said injection head being adjustable relative to said carrier in a direction transverse to the direction of movement of said carrier by said driving means, said apparatus further comprising first positioning means for adjusting the position of the injection head when in an injection position and in a withdrawn position, and second positioning means operable independently of the first positioning means for moving the injection head between said injection position and said withdrawn position.

Injection moulding apparatus comprising a movable carrier, a plurality of mould acts on the carrier, driving means for moving the carrier to move the liquid sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, wherein the injection head is mounted on an injection body for movement relative thereto and wherein the injection head and the injection body have respective internal passages which remain in mutual communication during the relative movement of the injection head and the injection body and wherein said injection body contains an injection screw.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, and wherein each mould set includes first and second mould tools between there is a mould cavity and wherein the mould set there is a sprue element that defines a sprue passage which, when the sprue element is in the charging position, provides communication between the mould cavity and an inlet to the mould set and which is out of communication with the mould cavity when the sprue element is in the severing position, and wherein the said mould set includes a severing device for severing a moulded sprue from a moulding formed in the mould set and the severing device includes a sprue element mounted in one of the tools for movement relative to the tools between a severing position and a charging position, and biasing means for urging the sprue element into the severing position.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station and into one or more separate heat transfer stations, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, and further comprising heat transfer means at said one or more separate heat transfer stations for applying heat to or extracting heat from a mould set at said one or more separate heat transfer stations, wherein said heat transfer means is arranged for engaging the mould set in thermally transmitting relation therewith and for movement out of said relation with the mould set at the heat transfer station.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station and into one or more separate cooling stations, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station and clamping means for clamping in a closed condition at least one of said mould sets, and further comprising a cooling means at a cooling station for extracting heat from a mould set at the cooling station, where the cooling means are arranged on the two opposite sides of the carrier on which the mould set rests.

Injection moulding apparatus comprising a movable carrier, a plurality of mould sets on the carrier, driving means for moving the carrier to move the mould sets in turn into an injection station, an injection head at the injection station, feed means for feeding a moulding composition through the injection head into a mould set at the injection station, clamping means for clamping in a closed condition at least one of said mould sets and where said carrier also moves the mould sets into a separate cooling station, said apparatus further comprising a pair of heat exchangers mounted for relative movement towards and away from each other and driving means for moving the heat exchangers into engagement with a mould set at said separate cooling station and for withdrawing the heat exchangers from that mould set, wherein each heat exchanger has at least one passage for flow of a heat transfer fluid through the heat exchanger.