When the single-part type injection mold is opened, the movable mold and the fixed mold are separated, so that the plastic parts are taken out, which is called a single-part mold, which is also called a double-plate mold. It is a very simple and basic form of injection mold. It can be designed as a single cavity injection mold or a multi-cavity injection mold according to needs. It is a widely used injection mold.
The double-split type injection mold double-split surface injection mold has two parting surfaces. Compared with the single-part type surface injection mold, the double-split surface injection mold adds a partially movable intermediate plate in the fixed mold part (again It is called the active gate plate, which is provided with gates, runners and other parts and components needed for the fixed mold. Therefore, it is also called the three-plate type (moving template, intermediate plate, fixed template) injection mold, which is often used for spotting. A single-cavity or multi-cavity injection mold for mouth feeding. When the mold is opened, the intermediate plate is separated from the fixed plate by a fixed distance on the fixed-column guide column, so that the pouring system aggregate is taken between the two templates.
The double-part molding mold has a complicated structure, high manufacturing cost, and difficult processing of parts, and is generally not used for molding large or extra large plastic products.
Injection Molding with Lateral Partitioning and Core Pulling Mechanisms When the plastic part has side holes or undercuts, it is necessary to form a core or slider that can be moved laterally. After injection molding, the movable mold is first moved downward by a distance, and then the inclined section of the bending pin fixed on the fixed template forces the slider to move outward, and at the same time, the push rod of the demolding mechanism pushes the pusher plate to make the plastic part self-shaped. Take off the core.
Injection Molding with Active Molded Parts Due to some special construction of plastic parts, it is required to set movable molding parts such as movable punches, movable die, movable inserts, movable thread cores or rings, etc. When demolding, it can be removed from the mold together with the plastic part, and then separated from the plastic part.
Automatic unloading of injection molds for threaded plastic parts. When automatic demoulding is required, a rotatable thread core or ring can be placed on the mold, using the mold opening action or the rotating mechanism of the injection molding machine, or setting a special The transmission drives the threaded core or the threaded ring to rotate, thereby releasing the plastic part.
The no-flow injection molding method refers to a method of adiabatic heating by using a pair of flow passages, and the plastic between the cavities of the injection molding machine nozzle is kept in a molten state, so that the mold is not poured when the mold is taken out. The former is called the adiabatic flow channel injection mold, and the latter is called the hot runner injection mold.
Right-angle injection molds Right-angle injection molds are only suitable for angle injection molding machines. Unlike other injection molds, the direction of the feed is perpendicular to the direction of the mold opening and closing. His mainstream road is located on both sides of the moving and fixed mold parting surface, and its cross-sectional area is usually constant, which is different from the molds used in other injection molding machines. The end of the mainstream road is to prevent the injection molding machine. The nozzles and the inlet end of the main flow path are worn and deformed, and a replaceable flow channel insert can be provided.
Demoulding mechanismInjection Molding on the Fixed Mold In most injection molds, the demolding device is mounted on the side of the movable mold, which is beneficial to the operation of the ejection device in the opening and closing system of the injection molding machine. In actual production, since some plastic parts are limited by the shape, it is better to leave the plastic parts on the side of the fixed mold, so that the plastic parts are taken out from the mold, and the mold release mechanism must be provided on the side of the fixed mold. .