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What is a double color injection molding, how to shape?

data:2014-12-26 19:26:34home stationviewed:2638

What is a double color injection molding, how to shape?

The so-called double color injection molding, it is to point to will two different colour and lustre of plastic injection molding method of the same mold. It can make the plastic parts in two different colors, and can make the plastic piece presents has a pattern of rules or rules of moire shape design and color, in order to improve the plastic pieces of practicality and beauty.

(1) double mixed color injection molding
It has two cylinder, each cylinder structure and use are the same as the common injection molding material barrel. Each cylinder has its own channel and nozzle are interlinked, in nozzle pathway also include open/close the valve 2, 4. Forming liquid in the cylinder was good plasticizing, controlled by the on-off valve 2, 4 order of molten material into the nozzle and discharge material proportion, and then by the nozzle injection into the mold cavity. You can get all kinds of mixed color effect of different plastic products.

(2) double pattern molding principle
For the pattern shown in injection molding principle diagram. It also has two cylinder 1 and 5, its some special nozzle structure, it besides has the function of the nozzle, usually also can drive by installed in the gear three at the back of the rotation. Molding, cylinder respectively 1, 5 in different colors of molten material, and the gear drives the rotating shaft 3 4, make different colour alternating melting into the cavity, so as to get around from the center to the radiation in the form of a different color and pattern of plastic products.

(3) the matters needing attention of double color injection molding because of the double color injection molding is made of two cylinder
Mix together forming, therefore, it comes from the fusion of the two cylinder material must have a good bonding strength, in order to guarantee good bonding strength, should try to use different colors of the same plastic. If use different breed double-color plastic injection molding, to combine performance test, you must first confirm qualified to put into production, otherwise, bad bonding strength of two kinds of plastic mixed together, is easy to appear crack defects such as plastic.

Double color mold
Double color mould, two kinds of plastic material in the same injection molding machine injection molding, two forming, but the product out of the mold only once the mold. This is also called the double injection molding process, usually performed by a set of mould, and need special double color injection molding machine.
Double color mould is becoming more and more popular on the market at present, in this process can make the product more beautiful appearance, easy to change color and can not spray, but expensive, high technical requirements.
1. The two shape of cavities is different, respectively, forming one kind of product, and that the male die of two exactly the same shape.
2. Mold to center before and after rotate for 180 o, must be identical. Design must do the check, the localization of the die set point processing the demand is higher.
3. The front mould panel and the total thickness of A plate may not be less than 170 mm. Please take a closer look at this type of injection molding machine of other reference data, for example, the maximum thickness of molar, the minimum thickness of molar, KO hole distance, etc.
4. Three board of shuikou better designed to automatically from the action. Special attention should be paid to the demoulding soft glue at the mouth of the action can *.
5. In the design of the second injection pattern master, in order to avoid secondary cavities inserted (or brush) adhesive has good product for the first time, part can be designed to avoid empty. But must be considered every seal adhesive strength, namely: in the injection molding, injection pressure, will there be in the big plastic deformation occurs, leading to the second injection may have a batch of front of may?
6. When we do the injection, the first of the injection molding product size can be slightly larger, to make it the second time molding can with another male die more tightly, in order to achieve the effect of sealing glue.
7. Pay attention to in the second injection molding, plastic flow will impulse has good product for the first time, the plastic deformation? If there's a possibility, must find a way to improve.
8. In front of the A and B plate clamping, pay attention to the front mould slider or lifter will reset and crush the product first? So, we must think of some way to make the A and B plate clamping first, after the former mould slider or lifter can reset.
9. Two cavities and the male die water arrangement as far as possible fully, and balanced, the same.
10.99% of the time is hard plastic part of the first injection products, injection products again soft rubber parts. Because the soft rubber easy deformation.