The device for demoulding negatives in thermoplastic injection moulds comprises an ejector (1) provided on one of the ends thereof with a figure insert (2) with a profile complementary to the part that is to be moulded, wherein said ejector (1) comprises an outer tube (11) housing an inner cooling tube (12), which cools said figure insert (2).

It allows for a device to be provided for demoulding negatives in thermoplastic injection moulds which enables the part to be obtained to be cooled, the cooling circuit reaching the figure area of the mould.

A device for demolding negatives in thermoplastic injection molds includes an ejector which comprises an ejector profile for the fastening thereof to an ejector plate and a figure insert with a profile that is complementary to a piece to be molded. The ejector further comprises a flexible element arranged between the ejector profile and the figure insert which pushes the figure insert in order to demold the negative by an angular displacement and stretches the figure insert so as to return the ejector to the injection position thereof. The device eliminates the need for molding sliders which are costly as well as the need for a machining process for the installation thereof.

A undercut processing mechanism includes: a sliding piece having a molding core for molding an undercut portion; a holder having a guide for guiding the sliding piece so that a molding core is detached from the undercut portion; and a retaining piece slidably accommodated in the holder and slidably engaged with the sliding piece. One of the holders and the retaining piece can advance/retract relative to the other thereof The retaining piece has a first engagement element and a second engagement element to be engaged with the sliding piece. The sliding piece is guided via the first engagement element and the second engagement element so that the molding core is detached from the undercut portion and moves away from the molded product.

A retaining unit includes: a movable ejector pin; a ring-shaped member used in a fixed state; and a ball plunger directly attached to the ejector pin or fixed to a fixing member attached to the ejector pin. The ball plunger is configured to press the ring-shaped member and engage the ejector pin with the ring-shaped member. When a force at a predetermined level or higher is applied to the ejector pin in a movement direction of the ejector pin, the engagement with the ring-shaped member is released so that the ejector pin is allowed to move. The ball plunger is incorporated into the ejector pin or the fixing member so as to be unitized together.

There is provided a method for non-penetration joining of members. The method includes: keeping a joining member having a protruding part by a receiving mold so that the protruding part is exposed; placing a joined member over the joining member so that the protruding part of the joining member is positioned in a blind hole of the joined member, and compressing the joined member against the receiving mold to plastically deform the joined member and the joining member at the same time and to wrap excess thickness of the joined member around an undercut part while forming the undercut part on the joining member, thereby non-detachably joining both the members.

An injection mold, including: an insert, a fixed half, a moving half and a core. The fixed half has a first groove and a rubber inlet communicating with the first groove. The moving half is configured for matching with the fixed half, the moving half has a second groove, and the fixed half and the moving half are arranged in layers to form a cavity together by the first groove communicating with the second groove. The core is partially embedded in the second groove and connected to the movable mold, the core has a diameter variable end at least partially located in the cavity. The insert is arranged on an end face of the diameter variable end, a first molding section is formed between the insert and a bottom of the first groove, the first molding section is configured for injection molding the flat portion.

The ejection device comprises: a pushing device (14) translatable along a first axis (A1) between a retracted position and an ejection position, an ejection element (28) translatable along a second axis (A2) between a retracted position and an ejection position, a transfer device (26) connecting the pushing device (14) and the ejection device (28). The transfer device (26) comprises at least two links (44), translatable relative to one another and relative to the pushing device (14) and the ejection element (28).

An openable vehicle roof having a wind deflector device which contains a wind deflector bow, which is produced from plastic material and has a central wind deflector profiled element having lateral deployment arms. At least the wind deflector profiled element has a profile leg, which delimits a groove, which is formed on the wind deflector profiled element and is open at the bottom and runs longitudinally, and the profile leg has, on the interior thereof facing the groove, a molded-on or attached fastening apparatus for an add-on part. A tool for producing a wind deflector bow is provided.

A core lifter having lifter bar with an elongate blade which carries a coupling head received in an elongate lifter bar coupling receiver formed in the base configured to permit pivotable, swiveling and/or translational misalignment or tolerance compensation during core lifter assembly, installation, and operation in a plastic formable material molding apparatus, including during mold cycling advantageously preventing core lifter binding and extending core lifter life. A preferred lifter has a lifter bar formed of a blade to which a lifter bar coupling ball is attached that is received in an elongate longitudinally extending channel having a transverse cross section complementary to the ball defining a bearing race in which the ball is received enabling slidable pivoting, swiveling and slidable movement of the ball and blade relative thereto including while the ball and blade are slidably moving along the race in a longitudinal or lengthwise direction relative to the base.

The present invention relates to an injection moulding system for forming an oven liner, particularly of the type that is used with microwave ovens. Oven liners are of particular benefit when used inside microwave ovens. They improve hygiene as where food spills or spurts onto the oven liner rather than an interior of the microwave oven. An injection moulding system for forming an oven liner includes: a first mould tool which defines a cavity of length (L), width (W) and height (H), the first mould tool has a substantially rectangular end face with dimensions corresponding to the width (W) and height (H) of the cavity and has a hot feed located at a centroid of its end face; and a wedge collapsing tool is received in the cavity so as to contact and engage with an external periphery of the first mould tool at selected locations in order to define a volume into which hot material feed is injected, wherein the wedge collapsing tool comprises a first part and a second part in slidable contact one with another, and the width (W2) of the second part exceeds the width (W1) of the first part of the wedge collapsing tool by at least 0.1 mm so that a split line is formed on at least one side of an interior surface of the oven liner.