A molding cycle stopping method includes: in a case of stopping an operation of a molding cycle in an injection device including a heating cylinder and a screw provided in the heating cylinder, performing a temperature lowering process including lowering a temperature of the heating cylinder from a molding cycle execution temperature to a standby temperature; and performing a continuous purge process including repeatedly purging a resin until a predetermined termination condition is satisfied.

An injection molding tool or an injection method for producing at least one molded part in a molding space, wherein the injection molding tool has at least two tool elements which are movable relative to one another between an open position and a closed position, wherein in the closed position the molding space is at least partially enclosed by the at least two tool elements and wherein in the open position a molded part produced in the molding space can be removed from the injection molding tool. In order to enable cleaning of the injection molding tool, a cleaning position is provided which lies between the open position and the closed position and in which a spacer element is arranged between the tool elements.

A female mold of an in-mold injection molding mold device has a first suction hole, a second suction hole, and a concave suction groove. The first suction hole opens in a bottom surface of a cavity of the female mold. The second suction hole opens in a part, to the inside of a damper, of a clamping surface of the female mold on which a male mold abuts, with a decoration film held therebetween. The suction groove is formed on a front surface of the female mold so as to make the cavity and the second suction hole communicate with each other. The first suction hole, the second suction hole, and the suction groove function as exhaust paths when air in a space between cavity surfaces defining the cavity and the decoration film is being discharged.

An apparatus for removing material residue from an external mixing element as it is being withdrawn from an external vessel containing the material mixed by the mixing element. The apparatus includes a stationary support member, a repositionable support assembly, and a rotatable material stripping element held captive by at least one element of the repositionable support assembly.

A material dispensing device includes: a plasticization unit including a screw and a heater and configured to generate a shaping material by plasticizing at least a part of a material; a cylinder coupled to a flow path configured to allow the shaping material to flow and extending in a direction intersecting a longitudinal direction of the flow path; a plunger provided in the cylinder; a drive unit configured to drive the plunger; and a control unit configured to control the plasticization unit and the drive unit, in which when the material is replaced from a first material to a second material different from the first material, the control unit performs cleaning processing of circulating the shaping material generated by plasticizing the second material through the flow path by rotating the screw in a state in which a tip of the plunger on a flow path side is located in the flow path.

In a control device of an injection molding machine, an operation mode of a resin purge operation is adjusted so that a plasticization amount index related to a plasticization amount of resin per unit time in the resin purge operation is approximately accorded with a target plasticization amount index which is set. Accordingly, thermal degradation of resin can be prevented, active time from start of a molding operation to completion of a non-defective molded article can be shortened, and production efficiency can be enhanced. Further, the plasticization amount index is not necessarily set by an operator, so that a load on the operator can be reduced as well.

In an aspect, a mold stack may comprise two adjacent components, one at least partially defining a vent adjustable between a molding configuration and a cleaning configuration. A junction of the components may be adjustable between a molding configuration, wherein mating faces contact one another to define a parting line, and a cleaning configuration, wherein mating faces are separated to create a molding cavity extension therebetween and an auxiliary melt barrier prevents uncontrolled flashing from the extension. In another aspect, a mold shut height adjustment mechanism may include a mold component movable along an operational axis of the mold, a stop member, movable along the axis relative to the mold component, having first and second stops for providing first and second gaps on the front and back sides, respectively, of the mold component when the stop member is deployed, and a spacer for use in selectively deploying the stop member.

The device for the suction of air in injection molds and the subsequent expulsion of molded pieces has a Venturi ejector connected to a first valve, that when the mold is closed causes the suction of air in a mold cavity, having at least one insert made from porous material through which and by means of a communication duct that defines a suction circuit, and a second valve, that after the solidification of the plastic material, causes the air to be blown towards the at least one insert made of porous material, cleaning the at least one insert made of porous material. The volume of air to be reduced in the second part of the injection cycle with the same empirical value of 90% efficiency of the Venturi ejector.

The present disclosure relates to a purging composition for extrusion equipment, kneading equipment, mixing equipment, compounding equipment, or moulding equipment. The present disclosure further relates to a method for cleaning an extrusion or injection moulding machine or a mixer to removing a contaminant therefrom. Finally, the present disclosure relates to the use of a purging composition for cleaning equipment used for machining or handling materials such as plastics, polymeric materials, polymeric resins, paints, and unvulcanized rubber to remove a contaminant or residue therefrom.

A mold component configured to be actuated between: a first configuration in which the mold component comprises a passage that allows passage of fluid (such as air) and prevents passage of the melt; and a second configuration in which the passage is actuated such as to become part of a molding surface.