Color mode: two on the same plastic material injection molding machine, a two-molding, but the product only once a die mold. In general this is also called double injection molding process is usually done by a set of molds, and the need for specialized color injection molding machine.
Plastic model kits: two plastic materials are not necessarily on the same injection molding machine, a two-molding; product out of the mold is removed from a mold, then put another set of molds for the second injection molding. So, in general this molding process is usually done by two sets of molds, without the need for a dedicated two-color injection molding machine.
Color mode has been popular on the market, and because this process can make the appearance of the product is more beautiful, easy to change colors and you can not spray, and certainly will be the market trend. Color mode based on issues currently encountered in the design and production, the latter are summarized in the hope that we follow in the future design work. Deficiencies of the Department, according to the "new mold design considerations."
A, Cavity two shapes are different, respectively, forming one kind of product.
The two shapes Core exactly the same.
2, before the mold after mold to the center of rotation 180 & ordm;, you must match. This action must be done to check the design.
3, note the location of the top of the stick hole, minimum distance 210mm. Large molds to be appropriate to increase the number of holes in the top of the stick. Also, the top stick itself because of the injection molding machine that comes with not long enough, so we must die design lengthened top stick, stick-embryo grow the top floor of about 150mm.
Must be designed two locating ring on the floor after the mold.
4, the total thickness of the front panel plus A plate mold of not less than 170mm. Please carefully review this model other reference data injection molding machines, for example, the maximum capacity of the mold thickness, the minimum thickness tolerance mode, the top rod hole distance.
5, three plate mold of outlet preferably designed to automatically release action. Pay particular attention to soft release outlet action is reliable.
6, the depth of the front side SPRUE not exceed 65mm. On the side (large outlet) top SPRUE distance from the center of the mold base to not less than 150mm.
7, in the design of a second injection of CAVITY, in order to avoid CAVITY plug (or rub) injury for the first time have a good product molding plastic bits, you can avoid the empty part of the design. However, the intensity must be carefully considered every sealed plastic bits, namely: in injection molding, whether there will be a big injection under pressure, plastic deformation occurs, resulting in a second injection may be approved front possible?
8, injection molding, injection molding products for the first time can be slightly larger size to make it in the second with another CAVITY molding presses tighter, in order to achieve the role of sealing glue.
9, note that during the second injection, the plastic flow of whether the impulse for the first time has been forming a good product to glue bit deformed? If there is a possibility, must find ways to improve.
10, in front of A, B plate mold, pay attention to whether the former mode Slider or Lifter will be reset and crushed product? So, we must find ways to make the A, B board first mold, mold SLIDER before or after LIFET to reset.