The two-color mold technology uses multiple materials for injection molding production, and combines the characteristics of different materials during the molding process to assemble or other suitable bonding methods to improve product functionality and aesthetics. Automotive lights in two-color molds are an important application area. The features of double color car lights molds are as below: 1. The moving side of double color molds will be rotated by rotary table of double color injection machine. Hence, car lights shall be fixed on moving mold well to avoid being stuck in cavity side. 2. The fixing position after mold rotation shall be very precise, hence, the rotary table of injection machine shall be driven with servo motor instead of hydraulic motor. 3. Injecting stroke shall be designed as shorter as possible in order to enhance the strength of ejecting rod.
The structure of the main part is very strong. It can squeeze all kinds of citrus fruits, such as oranges, tangerines, limes and lemons. It also has large capacity for juice. The citrus squeezer has very good touch feel, you can’t see any mark or parting line in the obvious side including the injection point, we make the injection point in the middle of the squeezer, it just looks like the base of lemon. The white part material is PP, it has very smooth touch without any burrs or sharp edges, and the yellow part material is TPE which is soft, and with the texture design, even if the hand is wet, it will not slide, so it is more convenient to use.
Two-color plastic kitchenware is now more and more popular, because double color injection products are more eye attractive than single color ones. For example, this two-color injection strainer, it combines the raw material PP and TPE which are food-grade materials. It means the plastic strainer was made from the materials which are safe and healthy, and are not easy to aging. The plastic strainer can directly contact food, it is soft and comfortable and easy to be used conveniently.
Generally speaking, the ejection action of the finished product from the mold is completed at one time, whether using single or multi-component ejection mechanism. However, due to the special shape of the finished product, or the requirement of mass production, if the finished product is still in the mold cavity after one ejection, or when it can not automatically fall off, it needs to add another ejection action. Such ejection action design is called 2 Times ejection. 2 Times ejection can make ejection flow smoothly. For some products requiring larger ejection travel, the use of 2 Times ejection can reduce the force exerted by the ejection pin and avoid the defects caused by the ejection pin.
Due to suddenly power failure, mold can not be opened while machine is under high pressure clamping. It is headache for this unexpected trouble.
Thread design sometimes exists in products for assembly purposes. It can be directly formed or machined after forming. For threads that are often disassembled or under heavy loads, the following principles should be taken into account when designing threaded inserts:
There are two ways to make two-color products, one is over moulding by 2-step injection, the other is double injection by single step, which includes using rotary table or axis to make two-color plastic injection products.