Selection principle of parting surface
In the toolbox mold design stage, the position of the parting surface should be determined first, and then the mold structure should be selected. Whether the selection of the parting surface is reasonable has a great influence on the quality process of the plastic parts, the difficulty of operation and the design and manufacture of the tool box mold. Therefore, the selection of the parting surface is a key factor in the design of the injection mold.
①. The selection of the parting surface should facilitate the moulding of the plastic parts and simplify the mold structure, and the parting surface should be selected so that the plastic parts remain in the movable mold when the mold is opened;
②. The parting surface should be selected as far as possible in the part that does not affect the appearance, and the flashing edge produced by it should be easy to eliminate and trim;
③. The selection of the parting surface should ensure the dimensional accuracy of the plastic parts;
④. The selection of the parting surface should be conducive to exhaust;
⑤. The selection of parting surface should facilitate the processing of mold parts;
⑥. The selection of the parting surface should consider the specifications of the injection machine
Mainstream Design
The main channel is the flow channel of the plastic melt from the contact part between the nozzle and the mold to the runner in the gating system. It belongs to the transition stage from the hot plastic melt to the relatively cold mold, so its shape and shape Size is very important.
Design of the cold material cavity
The function of the cold slug cavity is to store the cold slug generated between the two injections and the cold slug of the melt flow front to prevent the cold slug from entering the cavity. The cold material hole is generally set at the end of the main channel. When the branch channel is long, the cold material hole is sometimes set at the end of the branch channel. At the same time, the sprue condensate is pulled out from the sprue bushing and stays on the side of the movable die when the cold slug cavity is also used for parting.
The sharing of this issue is here. The design and manufacturing process of a good toolbox mold is inseparable from the professionalism of the engineer and the rigorous attitude of the mold company. Welcome to inquire.
Post time: May-18-2022