Today again on Thursday, saying that the weekend is also coming, the mold is now very hot, even if the rest I think most of my friends do not want to go out to the sun outside it. Today to introduce the design principles of plastic mold casting system.
(1) to ensure the quality of plastic parts (to avoid the common filling problem)
Stagnation is easy to make some parts of the workpiece over-pressure, some parts of the lack of pressure, so that the internal stress increased many.
Try to avoid welding marks
The presence of weld marks mainly affects the appearance, making the surface of the product worse; and the local weld bond strength will be poor.
Try to avoid excessive packing and insufficient packing
When the casting system design is poor or improper operating conditions, will make the melt in the cavity in the holding time is too long or to withstand excessive pressure is excessive pressure.
Excessive pressure will make the product density, increase the internal stress, or even flash.
Minimize the flow of clutter
Flowing messy will make the workpiece strength is poor, the surface of the lines are also less beautiful.
(2) to minimize and shorten the pouring system section and length
Minimize the heat loss and pressure loss of plastic melt
Reduce the amount of plastic and mold size
(3) as far as possible to achieve synchronization filling
In the case of a multi-cavity case, the melt entering each cavity can be reached at the same time, and the pressure at each inlet is equal.
Note: The above information is chaired by Jiezheng on the Internet, welcome reproduced, indicate the source!