(1) Single parting surface injection mold
When the mold is opened, the movable mold and the fixed mold are separated to take out the plastic parts. This is called a single parting surface mold, also called a double-plate mold. It is the simplest and most 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 the most widely used injection mold.
(2) Double parting surface injection mold
Double parting surface injection molds have two parting surfaces. Compared with single parting surface injection molds, double parting surface injection molds add a partially movable middle plate (also called a movable gate plate) to the fixed mold part. It is equipped with gates, runners and other parts and components required for the fixed mold), so it is also called a three-plate (moving plate, middle plate, fixed plate) injection mold. It is often used for single-type injection molding with point gate feeding. For a cavity or multi-cavity injection mold, when the mold is opened, the intermediate plate is separated from the fixed template at a certain distance on the guide pillar of the fixed mold, so that the pouring system condensate can be taken out between the two templates. Double parting surface injection molds have complex structures, high manufacturing costs, and difficult parts processing. They are generally not used for the molding of large or extra-large plastic products.
(3) Injection mold with lateral parting and core pulling mechanism
When the plastic part has side holes or undercuts, a laterally movable core or slider must be used for molding. After injection molding, the movable mold first moves downward for a certain distance, and then the inclined section of the bent pin fixed on the fixed platen forces the slider to move outward. At the same time, the push rod of the demoulding mechanism pushes the push plate to make the plastic part self-shaped. Take off the core.
(4) Injection molds with movable molded parts
Due to some special structures of plastic parts, the injection mold is required to be equipped with movable molding parts, such as movable punches, movable concave molds, movable inserts, movable thread cores or rings, etc., which can be combined with the plastic parts during demoulding. Move out of the mold together and then separate from the plastic part.
(5) Automatic thread removal injection mold
For plastic parts with threads, when automatic demoulding is required, a rotatable threaded core or ring can be installed on the mold, and the mold opening action or the rotating mechanism of the injection molding machine can be used, or a special transmission device can be set up to drive the threads The core or threaded ring rotates to release the plastic part.
(6) No-runner injection mold
The runnerless injection mold refers to the method of adiabatic heating of the runner to keep the plastic between the nozzle and the cavity of the injection molding machine in a molten state, so that there is no condensation in the gating system when the mold is opened and the plastic part is taken out. The former is called an insulated runner injection mold, and the latter is called a hot runner injection mold.
(7) Right angle injection mold
Right-angle injection molds are only suitable for angle-type injection molding machines. What is completely different from other injection molds is that the feeding direction of this type of mold is perpendicular to the opening and closing direction of the mold during molding. Its main flow channel is located on both sides of the movable and fixed mold parting surfaces, and its cross-sectional area is usually constant. This is different from the molds used in other injection molding machines. The end of the main flow channel, in order to prevent the injection molding machine from For wear and deformation of the nozzle and the inlet end of the main flow channel, replaceable flow channel inserts can be installed.
(8) Injection mold with demoulding mechanism on fixed mold
In most injection molds, the demoulding device is installed on the side of the movable mold, which facilitates the work of the ejection device in the mold opening and closing system of the injection molding machine. In actual production, due to the shape restrictions of some plastic parts, it is better to leave the plastic parts on the fixed mold side for molding. In order to make the plastic parts come out of the mold, a demoulding device must be installed on the fixed mold side. mechanism.
