Folding thermostat system of Injection Moulding
In order to meet the requirements of the injection process on the mold temperature, a temperature adjustment system is required to adjust the mold temperature. For injection molds for thermoplastics, a cooling system is mainly designed to cool the mold. The common method of mold cooling is to open a cooling water channel in the mold, and use the circulating cooling water to take away the heat of the mold; the heating of the mold can be done by using hot water or steam in the cooling water channel, and electricity can also be installed inside and around the mold. Heating element.
Folding molded parts
Molded parts refer to the various parts that make up the shape of the product, including movable molds, fixed molds and cavities, cores, molding rods, and vents. The molded part consists of a core and a cavity mold. The core forms the inner surface of the product, and the concave mold forms the shape of the outer surface of the product. After the mold is closed, the core and the cavity constitute the cavity of the mold. According to process and manufacturing requirements, sometimes the core and die are combined by several pieces, and sometimes they are made as a whole, and inserts are only used in the parts that are easy to damage and difficult to process.
Exhaust Vent
It is a trough-shaped air outlet opened in the mold to discharge the original gas and the gas brought in by the molten material. When the melt is injected into the cavity, the air originally stored in the cavity and the gas brought in by the melt must be discharged out of the mold through the exhaust port at the end of the material flow, otherwise the product will have pores, poor connection, Dissatisfaction with the filling of the mold, and even the accumulated air will burn the product due to the high temperature generated by the compression. Under normal circumstances, the vent can be located either at the end of the melt flow in the cavity or on the parting surface of the mold. The latter is a shallow groove with a depth of 0.03-0.2mm and a width of 1.5-6mm on one side of the cavity. During injection, there will not be a lot of molten material in the vent hole, because the molten material will cool and solidify at the place and block the channel.
The opening position of the exhaust port should not be facing the operator to prevent accidental spraying of molten material and hurting people. In addition, the fitting gap between the ejector rod and the ejector hole, the fitting gap between the ejector block and the stripper plate and the core can also be used for exhaust. It refers to the various parts that constitute the mold structure, including: guiding, demolding, core pulling and parting various parts. Such as front and rear splints, front and rear buckle templates, bearing plates, bearing columns, guide columns, stripping templates, demolding rods and return rods.
1. Guide parts
In order to ensure that the movable mold and the fixed mold can be accurately aligned when the mold is closed, a guide part must be provided in the mold. In the injection mold, four sets of guide posts and guide sleeves are usually used to form the guide part, and sometimes it is necessary to set mutually coincident inner and outer cones on the movable mold and the fixed mold to assist positioning.
2. Launch agency
During the mold opening process, an ejection mechanism is required to push out or pull out the plastic products and the aggregates in the runner. Push out the fixed plate and the push plate to clamp the push rod. A reset rod is generally fixed in the push rod, and the reset rod resets the push plate when the moving and fixed molds are closed.
3. Side core pulling mechanism
Some plastic products with undercuts or side holes must be parted laterally before being pushed out. After the lateral cores are drawn out, they can be demolded smoothly. At this time, a side core pulling mechanism is required in the mold.
Post time: Sep-27-2021