A mold includes a rotatable portion, a frame portion, a first and second portion, and a production unit. The rotatable portion has a plurality of surfaces and a plurality of forming portions. The plurality of surfaces is each provided with one of the plurality of forming portions, each having the same shape. The frame portion rotatably supports the rotatable portion. The first portion defines a cavity by coming into contact with one surface of the plurality of surfaces by clamping the mold. The second portion comes into contact with another surface of the plurality of surfaces different from the one surface by clamping the mold. The production unit attached to the frame portion.

A rotary-shaft type turntable positioning method of an injection molding machine is disclosed. A first encoder and a second encoder are installed at a driving shaft of a servomotor and a speed reducer respectively, so that after the injection molding machine finishes an injection molding, the driving shaft of the servomotor drives a transmission belt on an output shaft of the speed reducer to rotate a rotary shaft for the turntable to be rotated and positioned. During rotation, the first encoder and the second encoder sense a first rotation signal and a second rotation signal to adjust the position, so as to control the turntable to be rotated to a precise position.

The invention relates to a retaining device (5) for a rotatable center block (17) in an injection molding device (1), comprising a lower rotary plate (14) rotatable about an axis of rotation (13) and driven by a motor (15), the lower rotary plate being used for retaining the rotatable center block (17). The retaining device (5) comprises a lower cross member (7), which is mounted movably in the longitudinal direction (x) on guide rails (9) while supported on a machine bed of the injection molding device by means of first bearing blocks (8). The retaining device (5) can have two bearing blocks (16), by means of which the lower cross member (7) is supported in the circumferential direction relative to lower beams (4) of the injection molding device. For a further increase in efficiency, the center block (17) has a main body made of a material of lower density than a coupling plate (23) operatively connected thereto.

The invention relates to a molding device for producing a product by means of injection molding. The molding device comprises a central mold part, which can be rotated about a rotational axis and which comprises at least one inner mold half arranged on the central mold part, and at least one outer mold half, which interacts with the inner mold half in order to form cavities in a closed configuration of the molding device and which is arranged in a movable manner relative to the inner mold half in a first direction (x). Furthermore, at least one first connector element arranged on the central mold part and at least one second connector element arranged on the outer mold half are provided, said second connector element being operatively connected to the first connector element at least in a closed configuration of the molding device.

An inner mould tool forming part of a mould to be used during injection moulding of plastic articles, such as plastic tops for liquid food packages, is provided. The inner mould tool comprises an outer surface defining the interior surface of the plastic article to be produced, wherein the longitudinal end of the inner mould tool is provided with a bushing having a planar surface defining the longitudinal end of the inner mould tool and being configured to be in contact with mating outer mould tools during injection moulding. The bushing is provided with side walls extending from the planar surface, said side walls forming part of the outer surface of the inner mould tool.

In a three-plate injection-molding machine comprising a nozzle plate, a movable second mold clamping plate, a movable end plate, a closing unit that acts between the end plate and the second mold clamping plate, and a turning unit arranged between the nozzle plate and the second mold clamping plate, rails extend between the nozzle plate and the end plate. The mold-half carrier of the turning unit is supported on a support structure so that it can be rotated about an axis transverse to the machine axis, which support structure forms the abutment for the mold-half carrier rotary drive. The weight of the support structure and mold-half carrier of the turning unit is transferred into the machine bed by means of linear guides, and a substantial part of the reaction torque applied to the support structure is transferred to one of the rails by means of one supporting guide.

A carousel-like continuous co-injection molding system includes an arrangement of upper and lower inclined feed channels. Each of the feed channels has a valve therein positioned upstream of an inlet to an associated mold cavity. The valve is controllable so that adjustments may be made in real time to achieve or maintain delivery of molten polymeric material to the mold cavity at constant pressure.

Disclosed is a device for distributing thermoplastic material to a preform molding machine, the preforms being used for manufacturing containers; the device includes at least a stationary part and a movable part, a seal that has a first sealing surface and a second sealing surface which are axially separated from each other by a gap inside which some of the thermoplastic material flows, a channel for radially constraining the thermoplastic material, and an associated cooler for radially obtaining a temperature gradient in order to increase the viscosity of the thermoplastic material located between the sealing surfaces.

A molding die includes: a pair of dies, i.e., a first die and a second die respectively having abutting surfaces; a first die part and a second die part respectively having cavity forming portions inside which a cavity is formed, and thick portions provided at both ends of the cavity forming portions, the die parts being detachably fitted to die part attachment grooves provided in the abutting surfaces of the pair of dies; and induction heating coils for heating a surface of the cavity, wherein thicknesses of the cavity forming portions are smaller than thicknesses of the thick portions, and the distance between the induction heating coils and the cavity is smaller than the thicknesses of the thick portions.

Provided is an injection molding machine (1) including a plasticizing unit (2), an injection unit (3), a communication path (5a) configured to communicate therebetween and having an opening (5b) on the plasticizing unit side which is located on an axis of the screw (21), and a backflow prevention mechanism part (6) configured to close and open the opening on the plasticizing unit side by advancing and retreating the screw (21) in the axial direction, wherein the backflow prevention mechanism part (6) includes a tapered wedge portion (61) having an inclined surface (61a), a driving portion (63) which moves the wedge portion in the forward and backward directions, and a pressing member which is pressed against the inclined surface (61a) by forward movement of the wedge portion and moves the screw toward the opening on the plasticizing unit side.